55918311 has 8 divisors (see below), whose sum is σ = 78481920. Its totient is φ = 35316792.

The previous prime is 55918309. The next prime is 55918319. The reversal of 55918311 is 11381955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55918311 - 2¹ = 55918309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55918319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490455 + ... + 490568.

It is an arithmetic number, because the mean of its divisors is an integer number (9810240).

Almost surely, 2^55918311 is an apocalyptic number.

55918311 is a deficient number, since it is larger than the sum of its proper divisors (22563609).

55918311 is a wasteful number, since it uses less digits than its factorization.

55918311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981045.

The product of its digits is 5400, while the sum is 33.

The square root of 55918311 is about 7477.8547057294. The cubic root of 55918311 is about 382.4001157448.

The spelling of 55918311 in words is "fifty-five million, nine hundred eighteen thousand, three hundred eleven".