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103100130031 = 206949830899
BaseRepresentation
bin110000000000100111…
…1110010001011101111
3100212010020002021011111
41200001033302023233
53142122113130111
6115210305332451
710306626434323
oct1400117621357
9325106067144
10103100130031
113a7a7376738
1217b94037127
139950b81a02
144dc0a8d983
152a364aba21
hex18013f22ef

103100130031 has 4 divisors (see below), whose sum is σ = 103149963000. Its totient is φ = 103050297064.

The previous prime is 103100129999. The next prime is 103100130053. The reversal of 103100130031 is 130031001301.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130031001301 = 769169091029.

It is a cyclic number.

It is not a de Polignac number, because 103100130031 - 25 = 103100129999 is a prime.

It is a super-2 number, since 2×1031001300312 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103100129993 and 103100130020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103100100031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24913381 + ... + 24917518.

It is an arithmetic number, because the mean of its divisors is an integer number (25787490750).

Almost surely, 2103100130031 is an apocalyptic number.

103100130031 is a deficient number, since it is larger than the sum of its proper divisors (49832969).

103100130031 is an equidigital number, since it uses as much as digits as its factorization.

103100130031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49832968.

The product of its (nonzero) digits is 27, while the sum is 13.

Adding to 103100130031 its reverse (130031001301), we get a palindrome (233131131332).

The spelling of 103100130031 in words is "one hundred three billion, one hundred million, one hundred thirty thousand, thirty-one".

Divisors: 1 2069 49830899 103100130031