231550504504031 has 4 divisors (see below), whose sum is σ = 231581824747392. Its totient is φ = 231519184260672.

The previous prime is 231550504504021. The next prime is 231550504504043. The reversal of 231550504504031 is 130405405055132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231550504504031 is a prime.

It is a super-2 number, since 2×231550504504031² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231550504504021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15660110591 + ... + 15660125376.

It is an arithmetic number, because the mean of its divisors is an integer number (57895456186848).

Almost surely, 2^{231550504504031} is an apocalyptic number.

231550504504031 is a deficient number, since it is larger than the sum of its proper divisors (31320243361).

231550504504031 is an equidigital number, since it uses as much as digits as its factorization.

231550504504031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31320243360.

The product of its (nonzero) digits is 180000, while the sum is 38.

Adding to 231550504504031 its reverse (130405405055132), we get a palindrome (361955909559163).

The spelling of 231550504504031 in words is "two hundred thirty-one trillion, five hundred fifty billion, five hundred four million, five hundred four thousand, thirty-one".