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2031130031 = 72531114643
BaseRepresentation
bin111100100010000…
…1001010110101111
312020112221002121012
41321010021112233
513124432130111
6533314055435
7101222214620
oct17104112657
95215832535
102031130031
1195257a067
1248827a57b
13264a567b8
14153a7da47
15bd4b148b
hex791095af

2031130031 has 8 divisors (see below), whose sum is σ = 2322228864. Its totient is φ = 1740265560.

The previous prime is 2031130009. The next prime is 2031130061. The reversal of 2031130031 is 1300311302.

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 2031130031 - 210 = 2031129007 is a prime.

It is a super-2 number, since 2×20311300312 = 8250978405660121922, 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 = 2031129988 and 2031130015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031130061) 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, 39605 + ... + 75038.

It is an arithmetic number, because the mean of its divisors is an integer number (290278608).

Almost surely, 22031130031 is an apocalyptic number.

2031130031 is a deficient number, since it is larger than the sum of its proper divisors (291098833).

2031130031 is a wasteful number, since it uses less digits than its factorization.

2031130031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117181.

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

The square root of 2031130031 is about 45068.0599870906. The cubic root of 2031130031 is about 1266.4243214186.

Adding to 2031130031 its reverse (1300311302), we get a palindrome (3331441333).

The spelling of 2031130031 in words is "two billion, thirty-one million, one hundred thirty thousand, thirty-one".

Divisors: 1 7 2531 17717 114643 802501 290161433 2031130031