55921611 has 8 divisors (see below), whose sum is σ = 74619280. Its totient is φ = 37252512.

The previous prime is 55921601. The next prime is 55921627. The reversal of 55921611 is 11612955.

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

It is not a de Polignac number, because 55921611 - 2²⁵ = 22367179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55921601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2056 + ... + 10773.

It is an arithmetic number, because the mean of its divisors is an integer number (9327410).

Almost surely, 2^55921611 is an apocalyptic number.

55921611 is a deficient number, since it is larger than the sum of its proper divisors (18697669).

55921611 is a wasteful number, since it uses less digits than its factorization.

55921611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14285.

The product of its digits is 2700, while the sum is 30.

The square root of 55921611 is about 7478.0753539932. The cubic root of 55921611 is about 382.4076380008.

It can be divided in two parts, 55 and 921611, that multiplied together give a palindrome (50688605).

The spelling of 55921611 in words is "fifty-five million, nine hundred twenty-one thousand, six hundred eleven".