55626521 has 16 divisors (see below), whose sum is σ = 58662144. Its totient is φ = 52700544.

The previous prime is 55626491. The next prime is 55626523. The reversal of 55626521 is 12562655.

It is a cyclic number.

It is not a de Polignac number, because 55626521 - 2¹⁰ = 55625497 is a prime.

It is a Duffinian number.

Its product of digits (18000) is a multiple of the sum of its prime divisors (400).

It is not an unprimeable number, because it can be changed into a prime (55626523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341186 + ... + 341348.

It is an arithmetic number, because the mean of its divisors is an integer number (3666384).

Almost surely, 2^55626521 is an apocalyptic number.

It is an amenable number.

55626521 is a deficient number, since it is larger than the sum of its proper divisors (3035623).

55626521 is a wasteful number, since it uses less digits than its factorization.

55626521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400.

The product of its digits is 18000, while the sum is 32.

The square root of 55626521 is about 7458.3189124628. The cubic root of 55626521 is about 381.7338153648.

The spelling of 55626521 in words is "fifty-five million, six hundred twenty-six thousand, five hundred twenty-one".