31031220011158 has 16 divisors (see below), whose sum is σ = 48570762403296. Its totient is φ = 14840970242560.

The previous prime is 31031220011053. The next prime is 31031220011159. The reversal of 31031220011158 is 85111002213013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031220011159) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16236918 + ... + 18047158.

It is an arithmetic number, because the mean of its divisors is an integer number (3035672650206).

Almost surely, 2^{31031220011158} is an apocalyptic number.

31031220011158 is a deficient number, since it is larger than the sum of its proper divisors (17539542392138).

31031220011158 is a wasteful number, since it uses less digits than its factorization.

31031220011158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182919.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 31031220011158 in words is "thirty-one trillion, thirty-one billion, two hundred twenty million, eleven thousand, one hundred fifty-eight".