31505025942 has 24 divisors (see below), whose sum is σ = 73511727744. Its totient is φ = 9693854064.

The previous prime is 31505025913. The next prime is 31505025943. The reversal of 31505025942 is 24952050513.

It is a happy number.

31505025942 is a `hidden beast` number, since 3 + 15 + 0 + 50 + 2 + 594 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 31505025897 and 31505025906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31505025943) 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 11 ways as a sum of consecutive naturals, for example, 67318198 + ... + 67318665.

It is an arithmetic number, because the mean of its divisors is an integer number (3062988656).

Almost surely, 2^31505025942 is an apocalyptic number.

31505025942 is an abundant number, since it is smaller than the sum of its proper divisors (42006701802).

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

31505025942 is a wasteful number, since it uses less digits than its factorization.

31505025942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134636884 (or 134636881 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 31505025942 in words is "thirty-one billion, five hundred five million, twenty-five thousand, nine hundred forty-two".