31486631577025 has 9 divisors (see below), whose sum is σ = 39043457945571. Its totient is φ = 25189282816440.

The previous prime is 31486631577019. The next prime is 31486631577029. The reversal of 31486631577025 is 52077513668413.

The square root of 31486631577025 is 5611295.

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

It can be written as a sum of positive squares in only one way, i.e., 11335187367729 + 20151444209296 = 3366777^2 + 4489036^2 .

It is not a de Polignac number, because 31486631577025 - 2²⁷ = 31486497359297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31486631577029) 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, 27495346 + ... + 28617604.

Almost surely, 2^{31486631577025} is an apocalyptic number.

31486631577025 is the 5611295-th square number.

31486631577025 is the 2805648-th centered octagonal number.

It is an amenable number.

31486631577025 is a deficient number, since it is larger than the sum of its proper divisors (7556826368546).

31486631577025 is an frugal number, since it uses more digits than its factorization.

31486631577025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244528 (or 1122264 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 58.

The spelling of 31486631577025 in words is "thirty-one trillion, four hundred eighty-six billion, six hundred thirty-one million, five hundred seventy-seven thousand, twenty-five".