31113938 has 4 divisors (see below), whose sum is σ = 46670910. Its totient is φ = 15556968.

The previous prime is 31113923. The next prime is 31113947. The reversal of 31113938 is 83931113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 30614089 + 499849 = 5533^2 + 707^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31113938.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7778483 + ... + 7778486.

Almost surely, 2^31113938 is an apocalyptic number.

31113938 is a deficient number, since it is larger than the sum of its proper divisors (15556972).

31113938 is a wasteful number, since it uses less digits than its factorization.

31113938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15556971.

The product of its digits is 1944, while the sum is 29.

The square root of 31113938 is about 5577.9869128566. The cubic root of 31113938 is about 314.5224577302.

The spelling of 31113938 in words is "thirty-one million, one hundred thirteen thousand, nine hundred thirty-eight".