31394499158 has 16 divisors (see below), whose sum is σ = 51554356416. Its totient is φ = 14219799240.

The previous prime is 31394499139. The next prime is 31394499193. The reversal of 31394499158 is 85199449313.

It is a super-2 number, since 2×31394499158² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2515016 + ... + 2527467.

It is an arithmetic number, because the mean of its divisors is an integer number (3222147276).

Almost surely, 2^31394499158 is an apocalyptic number.

31394499158 is a deficient number, since it is larger than the sum of its proper divisors (20159857258).

31394499158 is a wasteful number, since it uses less digits than its factorization.

31394499158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5042779.

The product of its digits is 4199040, while the sum is 56.

The spelling of 31394499158 in words is "thirty-one billion, three hundred ninety-four million, four hundred ninety-nine thousand, one hundred fifty-eight".