54221931 has 6 divisors (see below), whose sum is σ = 78320580. Its totient is φ = 36147948.

The previous prime is 54221927. The next prime is 54221957. The reversal of 54221931 is 13912245.

It is not a de Polignac number, because 54221931 - 2² = 54221927 is a prime.

It is a super-2 number, since 2×54221931² = 5880035602737522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 54221895 and 54221904.

It is not an unprimeable number, because it can be changed into a prime (54221831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3012321 + ... + 3012338.

It is an arithmetic number, because the mean of its divisors is an integer number (13053430).

Almost surely, 2^54221931 is an apocalyptic number.

54221931 is a deficient number, since it is larger than the sum of its proper divisors (24098649).

54221931 is a wasteful number, since it uses less digits than its factorization.

54221931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6024665 (or 6024662 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 54221931 is about 7363.5542369158. The cubic root of 54221931 is about 378.4934137703.

The spelling of 54221931 in words is "fifty-four million, two hundred twenty-one thousand, nine hundred thirty-one".