31131392148 has 48 divisors (see below), whose sum is σ = 81915677760. Its totient is φ = 10222245792.

The previous prime is 31131392129. The next prime is 31131392161. The reversal of 31131392148 is 84129313113.

31131392148 is a `hidden beast` number, since 311 + 313 + 9 + 21 + 4 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2143911 + ... + 2158382.

It is an arithmetic number, because the mean of its divisors is an integer number (1706576620).

Almost surely, 2^31131392148 is an apocalyptic number.

It is an amenable number.

31131392148 is an abundant number, since it is smaller than the sum of its proper divisors (50784285612).

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

31131392148 is a wasteful number, since it uses less digits than its factorization.

31131392148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4302373 (or 4302365 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The spelling of 31131392148 in words is "thirty-one billion, one hundred thirty-one million, three hundred ninety-two thousand, one hundred forty-eight".