231503136331 has 4 divisors (see below), whose sum is σ = 231637498552. Its totient is φ = 231368774112.

The previous prime is 231503136311. The next prime is 231503136341. The reversal of 231503136331 is 133631305132.

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 231503136331 - 2¹⁹ = 231502612043 is a prime.

It is a super-2 number, since 2×231503136331² (a number of 24 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 = 231503136293 and 231503136302.

It is not an unprimeable number, because it can be changed into a prime (231503136311) 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, 67178526 + ... + 67181971.

It is an arithmetic number, because the mean of its divisors is an integer number (57909374638).

Almost surely, 2^231503136331 is an apocalyptic number.

231503136331 is a deficient number, since it is larger than the sum of its proper divisors (134362221).

231503136331 is a wasteful number, since it uses less digits than its factorization.

231503136331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134362220.

The product of its (nonzero) digits is 14580, while the sum is 31.

The spelling of 231503136331 in words is "two hundred thirty-one billion, five hundred three million, one hundred thirty-six thousand, three hundred thirty-one".