55974491 has 4 divisors (see below), whose sum is σ = 56088984. Its totient is φ = 55860000.

The previous prime is 55974487. The next prime is 55974493. The reversal of 55974491 is 19447955.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19447955 = 5 ⋅3889591.

It is a cyclic number.

It is not a de Polignac number, because 55974491 - 2² = 55974487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55974493) 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, 56510 + ... + 57491.

It is an arithmetic number, because the mean of its divisors is an integer number (14022246).

Almost surely, 2^55974491 is an apocalyptic number.

55974491 is a deficient number, since it is larger than the sum of its proper divisors (114493).

55974491 is a wasteful number, since it uses less digits than its factorization.

55974491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114492.

The product of its digits is 226800, while the sum is 44.

The square root of 55974491 is about 7481.6101876535. The cubic root of 55974491 is about 382.5281361108.

It can be divided in two parts, 55974 and 491, that added together give a palindrome (56465).

The spelling of 55974491 in words is "fifty-five million, nine hundred seventy-four thousand, four hundred ninety-one".