55320564 has 24 divisors (see below), whose sum is σ = 139011040. Its totient is φ = 17021664.

The previous prime is 55320553. The next prime is 55320569. The reversal of 55320564 is 46502355.

55320564 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

55320564 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55320569) 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, 177154 + ... + 177465.

Almost surely, 2^55320564 is an apocalyptic number.

It is an amenable number.

55320564 is an abundant number, since it is smaller than the sum of its proper divisors (83690476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55320564 is a wasteful number, since it uses less digits than its factorization.

55320564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354639 (or 354637 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 55320564 is about 7437.7795073530. The cubic root of 55320564 is about 381.0326574882.

The spelling of 55320564 in words is "fifty-five million, three hundred twenty thousand, five hundred sixty-four".