31159942 has 16 divisors (see below), whose sum is σ = 51075072. Its totient is φ = 14139720.

The previous prime is 31159903. The next prime is 31159951. The reversal of 31159942 is 24995113.

It is a junction number, because it is equal to n+sod(n) for n = 31159898 and 31159907.

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, 23263 + ... + 24565.

It is an arithmetic number, because the mean of its divisors is an integer number (3192192).

Almost surely, 2^31159942 is an apocalyptic number.

31159942 is a deficient number, since it is larger than the sum of its proper divisors (19915130).

31159942 is a wasteful number, since it uses less digits than its factorization.

31159942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403.

The product of its digits is 9720, while the sum is 34.

The square root of 31159942 is about 5582.1090996146. The cubic root of 31159942 is about 314.6773954276.

The spelling of 31159942 in words is "thirty-one million, one hundred fifty-nine thousand, nine hundred forty-two".