31815702853 has 6 divisors (see below), whose sum is σ = 34970979302. Its totient is φ = 28923366120.

The previous prime is 31815702797. The next prime is 31815702917. The reversal of 31815702853 is 35820751813.

It can be written as a sum of positive squares in only one way, i.e., 16697033089 + 15118669764 = 129217^2 + 122958^2 .

It is not a de Polignac number, because 31815702853 - 2²¹ = 31813605701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31815702553) 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 5 ways as a sum of consecutive naturals, for example, 131469726 + ... + 131469967.

Almost surely, 2^31815702853 is an apocalyptic number.

It is an amenable number.

31815702853 is a deficient number, since it is larger than the sum of its proper divisors (3155276449).

31815702853 is a wasteful number, since it uses less digits than its factorization.

31815702853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262939715 (or 262939704 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 31815702853 in words is "thirty-one billion, eight hundred fifteen million, seven hundred two thousand, eight hundred fifty-three".