31215454245 has 16 divisors (see below), whose sum is σ = 55494141120. Its totient is φ = 16648242192.

The previous prime is 31215454243. The next prime is 31215454253. The reversal of 31215454245 is 54245451213.

31215454245 is a `hidden beast` number, since 3 + 1 + 21 + 54 + 542 + 45 = 666.

It is not a de Polignac number, because 31215454245 - 2¹ = 31215454243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31215454243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115612659 + ... + 115612928.

It is an arithmetic number, because the mean of its divisors is an integer number (3468383820).

Almost surely, 2^31215454245 is an apocalyptic number.

It is an amenable number.

31215454245 is a deficient number, since it is larger than the sum of its proper divisors (24278686875).

31215454245 is a wasteful number, since it uses less digits than its factorization.

31215454245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231225601 (or 231225595 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The spelling of 31215454245 in words is "thirty-one billion, two hundred fifteen million, four hundred fifty-four thousand, two hundred forty-five".