31550331042 has 48 divisors (see below), whose sum is σ = 72472694112. Its totient is φ = 9885490560.

The previous prime is 31550331031. The next prime is 31550331053. The reversal of 31550331042 is 24013305513.

31550331042 is a `hidden beast` number, since 3 + 1 + 550 + 3 + 3 + 104 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (31550331031) and next prime (31550331053).

It is a junction number, because it is equal to n+sod(n) for n = 31550330997 and 31550331015.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 175317 + ... + 306327.

It is an arithmetic number, because the mean of its divisors is an integer number (1509847794).

Almost surely, 2^31550331042 is an apocalyptic number.

31550331042 is an abundant number, since it is smaller than the sum of its proper divisors (40922363070).

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

31550331042 is a wasteful number, since it uses less digits than its factorization.

31550331042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131823 (or 131820 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 31550331042 its reverse (24013305513), we get a palindrome (55563636555).

The spelling of 31550331042 in words is "thirty-one billion, five hundred fifty million, three hundred thirty-one thousand, forty-two".