31899051 has 6 divisors (see below), whose sum is σ = 46076420. Its totient is φ = 21266028.

The previous prime is 31899047. The next prime is 31899059. The reversal of 31899051 is 15099813.

It is a happy number.

It is not a de Polignac number, because 31899051 - 2² = 31899047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31898997 and 31899015.

It is not an unprimeable number, because it can be changed into a prime (31899059) 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 5 ways as a sum of consecutive naturals, for example, 1772161 + ... + 1772178.

Almost surely, 2^31899051 is an apocalyptic number.

31899051 is a deficient number, since it is larger than the sum of its proper divisors (14177369).

31899051 is a wasteful number, since it uses less digits than its factorization.

31899051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3544345 (or 3544342 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 31899051 is about 5647.9244860391. The cubic root of 31899051 is about 317.1460117429.

The spelling of 31899051 in words is "thirty-one million, eight hundred ninety-nine thousand, fifty-one".