55813491 has 6 divisors (see below), whose sum is σ = 80619500. Its totient is φ = 37208988.

The previous prime is 55813489. The next prime is 55813493. The reversal of 55813491 is 19431855.

55813491 is a `hidden beast` number, since 558 + 13 + 4 + 91 = 666.

It is an interprime number because it is at equal distance from previous prime (55813489) and next prime (55813493).

It is not a de Polignac number, because 55813491 - 2¹ = 55813489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55813493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3100741 + ... + 3100758.

Almost surely, 2^55813491 is an apocalyptic number.

55813491 is a deficient number, since it is larger than the sum of its proper divisors (24806009).

55813491 is a wasteful number, since it uses less digits than its factorization.

55813491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6201505 (or 6201502 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 55813491 is about 7470.8427235487. The cubic root of 55813491 is about 382.1610273847.

The spelling of 55813491 in words is "fifty-five million, eight hundred thirteen thousand, four hundred ninety-one".