231579425529 has 9 divisors (see below), whose sum is σ = 334505699983. Its totient is φ = 154385321232.

The previous prime is 231579425527. The next prime is 231579425537. The reversal of 231579425529 is 925524975132.

The square root of 231579425529 is 481227.

It is a perfect power (a square), and thus also a powerful number.

231579425529 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 7 + 94 + 25 + 529 = 666.

It can be written as a sum of positive squares in only one way, i.e., 58190465529 + 173388960000 = 241227^2 + 416400^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 231579425529 - 2¹ = 231579425527 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231579425521) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1363477 + ... + 1523885.

Almost surely, 2^231579425529 is an apocalyptic number.

231579425529 is the 481227-th square number.

231579425529 is the 240614-th centered octagonal number.

It is an amenable number.

231579425529 is a deficient number, since it is larger than the sum of its proper divisors (102926274454).

231579425529 is an frugal number, since it uses more digits than its factorization.

231579425529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320824 (or 160412 counting only the distinct ones).

The product of its digits is 6804000, while the sum is 54.

The spelling of 231579425529 in words is "two hundred thirty-one billion, five hundred seventy-nine million, four hundred twenty-five thousand, five hundred twenty-nine".