55056621 has 8 divisors (see below), whose sum is σ = 73475424. Its totient is φ = 36671120.

The previous prime is 55056619. The next prime is 55056653. The reversal of 55056621 is 12665055.

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 55056621 - 2¹ = 55056619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55056121) 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, 4170 + ... + 11291.

It is an arithmetic number, because the mean of its divisors is an integer number (9184428).

Almost surely, 2^55056621 is an apocalyptic number.

It is an amenable number.

55056621 is a deficient number, since it is larger than the sum of its proper divisors (18418803).

55056621 is a wasteful number, since it uses less digits than its factorization.

55056621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16651.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 55056621 is about 7420.0148921683. The cubic root of 55056621 is about 380.4257025140.

The spelling of 55056621 in words is "fifty-five million, fifty-six thousand, six hundred twenty-one".