31163442 has 16 divisors (see below), whose sum is σ = 63257952. Its totient is φ = 10232640.

The previous prime is 31163437. The next prime is 31163453. The reversal of 31163442 is 24436113.

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, 38359 + ... + 39162.

It is an arithmetic number, because the mean of its divisors is an integer number (3953622).

Almost surely, 2^31163442 is an apocalyptic number.

31163442 is an abundant number, since it is smaller than the sum of its proper divisors (32094510).

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

31163442 is a wasteful number, since it uses less digits than its factorization.

31163442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77593.

The product of its digits is 1728, while the sum is 24.

The square root of 31163442 is about 5582.4225923876. The cubic root of 31163442 is about 314.6891768964.

Adding to 31163442 its reverse (24436113), we get a palindrome (55599555).

The spelling of 31163442 in words is "thirty-one million, one hundred sixty-three thousand, four hundred forty-two".