31985534025 has 27 divisors (see below), whose sum is σ = 57294450759. Its totient is φ = 17057520720.

The previous prime is 31985534023. The next prime is 31985534029. The reversal of 31985534025 is 52043558913.

The square root of 31985534025 is 178845.

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

31985534025 is a `hidden beast` number, since 3 + 1 + 98 + 5 + 534 + 0 + 25 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11514792249 + 20470741776 = 107307^2 + 143076^2 .

It is not a de Polignac number, because 31985534025 - 2¹ = 31985534023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (31985534023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2676714 + ... + 2688636.

Almost surely, 2^31985534025 is an apocalyptic number.

31985534025 is the 178845-th square number.

31985534025 is the 89423-rd centered octagonal number.

It is an amenable number.

31985534025 is a deficient number, since it is larger than the sum of its proper divisors (25308916734).

31985534025 is an frugal number, since it uses more digits than its factorization.

31985534025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23862 (or 11931 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 31985534025 in words is "thirty-one billion, nine hundred eighty-five million, five hundred thirty-four thousand, twenty-five".