231513450031994 has 16 divisors (see below), whose sum is σ = 374915892050280. Its totient is φ = 106585896806400.

The previous prime is 231513450031993. The next prime is 231513450032017. The reversal of 231513450031994 is 499130054315132.

It can be written as a sum of positive squares in 4 ways, for example, as 226917678781369 + 4595771250625 = 15063787^2 + 2143775^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231513450031993) 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, 11102687159 + ... + 11102708010.

Almost surely, 2^{231513450031994} is an apocalyptic number.

231513450031994 is a deficient number, since it is larger than the sum of its proper divisors (143402442018286).

231513450031994 is a wasteful number, since it uses less digits than its factorization.

231513450031994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22205395585.

The product of its (nonzero) digits is 1749600, while the sum is 50.

The spelling of 231513450031994 in words is "two hundred thirty-one trillion, five hundred thirteen billion, four hundred fifty million, thirty-one thousand, nine hundred ninety-four".