231512405450 has 12 divisors (see below), whose sum is σ = 430613074230. Its totient is φ = 92604962160.

The previous prime is 231512405363. The next prime is 231512405491. The reversal of 231512405450 is 54504215132.

It can be written as a sum of positive squares in 3 ways, for example, as 153732215569 + 77780189881 = 392087^2 + 278891^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2315124005 + ... + 2315124104.

Almost surely, 2^231512405450 is an apocalyptic number.

231512405450 is a deficient number, since it is larger than the sum of its proper divisors (199100668780).

231512405450 is a wasteful number, since it uses less digits than its factorization.

231512405450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4630248121 (or 4630248116 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 231512405450 in words is "two hundred thirty-one billion, five hundred twelve million, four hundred five thousand, four hundred fifty".