31551011042 has 32 divisors (see below), whose sum is σ = 51893550720. Its totient is φ = 14320293120.

The previous prime is 31551011033. The next prime is 31551011057. The reversal of 31551011042 is 24011015513.

It is a junction number, because it is equal to n+sod(n) for n = 31551010999 and 31551011017.

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 15 ways as a sum of consecutive naturals, for example, 936917 + ... + 970007.

It is an arithmetic number, because the mean of its divisors is an integer number (1621673460).

Almost surely, 2^31551011042 is an apocalyptic number.

31551011042 is a deficient number, since it is larger than the sum of its proper divisors (20342539678).

31551011042 is a wasteful number, since it uses less digits than its factorization.

31551011042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34106.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 31551011042 its reverse (24011015513), we get a palindrome (55562026555).

The spelling of 31551011042 in words is "thirty-one billion, five hundred fifty-one million, eleven thousand, forty-two".