31799805625 has 45 divisors (see below), whose sum is σ = 46270123977. Its totient is φ = 21784182000.

The previous prime is 31799805619. The next prime is 31799805691. The reversal of 31799805625 is 52650899713.

The square root of 31799805625 is 178325.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2493104761 + 29306700864 = 49931^2 + 171192^2 .

It is not a de Polignac number, because 31799805625 - 2⁵ = 31799805593 is a prime.

It is a super-2 number, since 2×31799805625² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 31206366 + ... + 31207384.

Almost surely, 2^31799805625 is an apocalyptic number.

31799805625 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

31799805625 is the 178325-th square number.

31799805625 is the 89163-rd centered octagonal number.

It is an amenable number.

31799805625 is a deficient number, since it is larger than the sum of its proper divisors (14470318352).

31799805625 is an frugal number, since it uses more digits than its factorization.

31799805625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 31799805625 in words is "thirty-one billion, seven hundred ninety-nine million, eight hundred five thousand, six hundred twenty-five".