54921931 has 2 divisors, whose sum is σ = 54921932. Its totient is φ = 54921930.

The previous prime is 54921929. The next prime is 54921941. The reversal of 54921931 is 13912945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54921931 - 2¹ = 54921929 is a prime.

It is a super-2 number, since 2×54921931² = 6032837009537522, which contains 22 as substring.

Together with 54921929, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (54921941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27460965 + 27460966.

It is an arithmetic number, because the mean of its divisors is an integer number (27460966).

Almost surely, 2^54921931 is an apocalyptic number.

54921931 is a deficient number, since it is larger than the sum of its proper divisors (1).

54921931 is an equidigital number, since it uses as much as digits as its factorization.

54921931 is an evil number, because the sum of its binary digits is even.

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

The square root of 54921931 is about 7410.9332070934. The cubic root of 54921931 is about 380.1152259065.

The spelling of 54921931 in words is "fifty-four million, nine hundred twenty-one thousand, nine hundred thirty-one".