55574391 has 4 divisors (see below), whose sum is σ = 74099192. Its totient is φ = 37049592.

The previous prime is 55574357. The next prime is 55574429. The reversal of 55574391 is 19347555.

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

It is not a de Polignac number, because 55574391 - 2¹⁵ = 55541623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55574591) 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, 9262396 + ... + 9262401.

It is an arithmetic number, because the mean of its divisors is an integer number (18524798).

Almost surely, 2^55574391 is an apocalyptic number.

55574391 is a deficient number, since it is larger than the sum of its proper divisors (18524801).

55574391 is a wasteful number, since it uses less digits than its factorization.

55574391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18524800.

The product of its digits is 94500, while the sum is 39.

The square root of 55574391 is about 7454.8233379471. The cubic root of 55574391 is about 381.6145317150.

The spelling of 55574391 in words is "fifty-five million, five hundred seventy-four thousand, three hundred ninety-one".