31216520253 has 8 divisors (see below), whose sum is σ = 43431680448. Its totient is φ = 19906186784.

The previous prime is 31216520239. The next prime is 31216520273. The reversal of 31216520253 is 35202561213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31216520253 - 2³³ = 22626585661 is a prime.

It is a super-2 number, since 2×31216520253² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31216520253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31216520233) 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 7 ways as a sum of consecutive naturals, for example, 226206600 + ... + 226206737.

It is an arithmetic number, because the mean of its divisors is an integer number (5428960056).

Almost surely, 2^31216520253 is an apocalyptic number.

It is an amenable number.

31216520253 is a deficient number, since it is larger than the sum of its proper divisors (12215160195).

31216520253 is a wasteful number, since it uses less digits than its factorization.

31216520253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452413363.

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 31216520253 in words is "thirty-one billion, two hundred sixteen million, five hundred twenty thousand, two hundred fifty-three".