31231438245 has 64 divisors (see below), whose sum is σ = 63755489280. Its totient is φ = 14209473600.

The previous prime is 31231438243. The next prime is 31231438253. The reversal of 31231438245 is 54283413213.

31231438245 is a `hidden beast` number, since 3 + 1 + 231 + 4 + 382 + 45 = 666.

It is not a de Polignac number, because 31231438245 - 2¹ = 31231438243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231438243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 121080 + ... + 277710.

It is an arithmetic number, because the mean of its divisors is an integer number (996179520).

Almost surely, 2^31231438245 is an apocalyptic number.

31231438245 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31231438245 is an abundant number, since it is smaller than the sum of its proper divisors (32524051035).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31231438245 is a wasteful number, since it uses less digits than its factorization.

31231438245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156863 (or 156857 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The spelling of 31231438245 in words is "thirty-one billion, two hundred thirty-one million, four hundred thirty-eight thousand, two hundred forty-five".