231131101000031 has 4 divisors (see below), whose sum is σ = 231135240000792. Its totient is φ = 231126961999272.

The previous prime is 231131100999977. The next prime is 231131101000103. The reversal of 231131101000031 is 130000101131132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231131101000031 - 2³⁴ = 231113921130847 is a prime.

It is a super-2 number, since 2×231131101000031² (a number of 30 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 = 231131100999973 and 231131101000009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231131101080031) 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, 2069416616 + ... + 2069528301.

It is an arithmetic number, because the mean of its divisors is an integer number (57783810000198).

Almost surely, 2^{231131101000031} is an apocalyptic number.

231131101000031 is a deficient number, since it is larger than the sum of its proper divisors (4139000761).

231131101000031 is an equidigital number, since it uses as much as digits as its factorization.

231131101000031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4139000760.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 231131101000031 its reverse (130000101131132), we get a palindrome (361131202131163).

The spelling of 231131101000031 in words is "two hundred thirty-one trillion, one hundred thirty-one billion, one hundred one million, thirty-one", and thus it is an aban number.