55904191 has 24 divisors (see below), whose sum is σ = 69085184. Its totient is φ = 44264880.

The previous prime is 55904179. The next prime is 55904201. The reversal of 55904191 is 19140955.

It is a happy number.

It is not a de Polignac number, because 55904191 - 2¹³ = 55895999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55904111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114550 + ... + 115036.

Almost surely, 2^55904191 is an apocalyptic number.

55904191 is a deficient number, since it is larger than the sum of its proper divisors (13180993).

55904191 is a wasteful number, since it uses less digits than its factorization.

55904191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 55904191 is about 7476.9105250765. The cubic root of 55904191 is about 382.3679262641.

The spelling of 55904191 in words is "fifty-five million, nine hundred four thousand, one hundred ninety-one".