31118724025 has 9 divisors (see below), whose sum is σ = 38588311533. Its totient is φ = 24894273600.

The previous prime is 31118723927. The next prime is 31118724031. The reversal of 31118724025 is 52042781113.

The square root of 31118724025 is 176405.

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

It can be written as a sum of positive squares in 4 ways, for example, as 6618961449 + 24499762576 = 81357^2 + 156524^2 .

It is not a de Polignac number, because 31118724025 - 2²¹ = 31116626873 is a prime.

It is a super-2 number, since 2×31118724025² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 864385 + ... + 899665.

Almost surely, 2^31118724025 is an apocalyptic number.

31118724025 is the 176405-th square number.

31118724025 is the 88203-rd centered octagonal number.

It is an amenable number.

31118724025 is a deficient number, since it is larger than the sum of its proper divisors (7469587508).

31118724025 is an frugal number, since it uses more digits than its factorization.

31118724025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70572 (or 35286 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 31118724025 in words is "thirty-one billion, one hundred eighteen million, seven hundred twenty-four thousand, twenty-five".