49921931 has 4 divisors (see below), whose sum is σ = 50363832. Its totient is φ = 49480032.

The previous prime is 49921903. The next prime is 49921933. The reversal of 49921931 is 13912994.

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

It is a cyclic number.

It is not a de Polignac number, because 49921931 - 2⁶ = 49921867 is a prime.

It is a super-2 number, since 2×49921931² = 4984398389537522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49921933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220781 + ... + 221006.

It is an arithmetic number, because the mean of its divisors is an integer number (12590958).

Almost surely, 2^49921931 is an apocalyptic number.

49921931 is a deficient number, since it is larger than the sum of its proper divisors (441901).

49921931 is a wasteful number, since it uses less digits than its factorization.

49921931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441900.

The product of its digits is 17496, while the sum is 38.

The square root of 49921931 is about 7065.5453434254. The cubic root of 49921931 is about 368.2113108815.

The spelling of 49921931 in words is "forty-nine million, nine hundred twenty-one thousand, nine hundred thirty-one".