55921475 has 12 divisors (see below), whose sum is σ = 69448680. Its totient is φ = 44668800.

The previous prime is 55921423. The next prime is 55921501. The reversal of 55921475 is 57412955.

It is a happy number.

55921475 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-55921475 is a prime.

It is a super-2 number, since 2×55921475² = 6254422732351250, which contains 22 as substring.

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 in 11 ways as a sum of consecutive naturals, for example, 20756 + ... + 23294.

It is an arithmetic number, because the mean of its divisors is an integer number (5787390).

Almost surely, 2^55921475 is an apocalyptic number.

55921475 is a deficient number, since it is larger than the sum of its proper divisors (13527205).

55921475 is a wasteful number, since it uses less digits than its factorization.

55921475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3430 (or 3425 counting only the distinct ones).

The product of its digits is 63000, while the sum is 38.

The square root of 55921475 is about 7478.0662607388. The cubic root of 55921475 is about 382.4073279985.

The spelling of 55921475 in words is "fifty-five million, nine hundred twenty-one thousand, four hundred seventy-five".