55759221 has 24 divisors (see below), whose sum is σ = 94296384. Its totient is φ = 31083840.

The previous prime is 55759181. The next prime is 55759229. The reversal of 55759221 is 12295755.

It is not a de Polignac number, because 55759221 - 2⁶ = 55759157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55759229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8211 + ... + 13376.

It is an arithmetic number, because the mean of its divisors is an integer number (3929016).

Almost surely, 2^55759221 is an apocalyptic number.

It is an amenable number.

55759221 is a deficient number, since it is larger than the sum of its proper divisors (38537163).

55759221 is a wasteful number, since it uses less digits than its factorization.

55759221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21641 (or 21638 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 55759221 is about 7467.2097198351. The cubic root of 55759221 is about 382.0371230244.

The spelling of 55759221 in words is "fifty-five million, seven hundred fifty-nine thousand, two hundred twenty-one".