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2100313031 = 25152116061
BaseRepresentation
bin111110100110000…
…0011101111000111
312102101002221211112
41331030003233013
513300140004111
6544224555235
7103022236415
oct17514035707
95371087745
102100313031
119886322a3
124a7482b1b
1327619a49b
1415cd2c2b5
15c45c9e8b
hex7d303bc7

2100313031 has 8 divisors (see below), whose sum is σ = 2112859728. Its totient is φ = 2087800000.

The previous prime is 2100313013. The next prime is 2100313049. The reversal of 2100313031 is 1303130012.

It is an interprime number because it is at equal distance from previous prime (2100313013) and next prime (2100313049).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2100313031 - 214 = 2100296647 is a prime.

It is a super-2 number, since 2×21003130312 = 8822629656376813922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100312997 and 2100313015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100313001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122741 + ... + 138801.

It is an arithmetic number, because the mean of its divisors is an integer number (264107466).

Almost surely, 22100313031 is an apocalyptic number.

2100313031 is a deficient number, since it is larger than the sum of its proper divisors (12546697).

2100313031 is a wasteful number, since it uses less digits than its factorization.

2100313031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16833.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 2100313031 is about 45829.1722705091. The cubic root of 2100313031 is about 1280.6427905526.

Adding to 2100313031 its reverse (1303130012), we get a palindrome (3403443043).

The spelling of 2100313031 in words is "two billion, one hundred million, three hundred thirteen thousand, thirty-one".

Divisors: 1 251 521 16061 130771 4031311 8367781 2100313031