55968821 has 8 divisors (see below), whose sum is σ = 58764480. Its totient is φ = 53203392.

The previous prime is 55968799. The next prime is 55968823. The reversal of 55968821 is 12886955.

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

It is a cyclic number.

It is not a de Polignac number, because 55968821 - 2²² = 51774517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55968823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3716 + ... + 11213.

It is an arithmetic number, because the mean of its divisors is an integer number (7345560).

Almost surely, 2^55968821 is an apocalyptic number.

It is an amenable number.

55968821 is a deficient number, since it is larger than the sum of its proper divisors (2795659).

55968821 is a wasteful number, since it uses less digits than its factorization.

55968821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15115.

The product of its digits is 172800, while the sum is 44.

The square root of 55968821 is about 7481.2312489322. The cubic root of 55968821 is about 382.5152194665.

The spelling of 55968821 in words is "fifty-five million, nine hundred sixty-eight thousand, eight hundred twenty-one".