55913291 has 4 divisors (see below), whose sum is σ = 63900912. Its totient is φ = 47925672.

The previous prime is 55913267. The next prime is 55913303. The reversal of 55913291 is 19231955.

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

It is a cyclic number.

It is not a de Polignac number, because 55913291 - 2⁶ = 55913227 is a prime.

It is a super-2 number, since 2×55913291² = 6252592220901362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55913261) 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, 3993800 + ... + 3993813.

It is an arithmetic number, because the mean of its divisors is an integer number (15975228).

Almost surely, 2^55913291 is an apocalyptic number.

55913291 is a deficient number, since it is larger than the sum of its proper divisors (7987621).

55913291 is an equidigital number, since it uses as much as digits as its factorization.

55913291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7987620.

The product of its digits is 12150, while the sum is 35.

The square root of 55913291 is about 7477.5190404305. The cubic root of 55913291 is about 382.3886722301.

The spelling of 55913291 in words is "fifty-five million, nine hundred thirteen thousand, two hundred ninety-one".