55320152 has 32 divisors (see below), whose sum is σ = 110890080. Its totient is φ = 25808640.

The previous prime is 55320131. The next prime is 55320157. The reversal of 55320152 is 25102355.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55320157) 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, 3878 + ... + 11210.

It is an arithmetic number, because the mean of its divisors is an integer number (3465315).

Almost surely, 2^55320152 is an apocalyptic number.

It is an amenable number.

55320152 is an abundant number, since it is smaller than the sum of its proper divisors (55569928).

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

55320152 is a wasteful number, since it uses less digits than its factorization.

55320152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7403 (or 7399 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 55320152 is about 7437.7518108633. The cubic root of 55320152 is about 381.0317115721.

The spelling of 55320152 in words is "fifty-five million, three hundred twenty thousand, one hundred fifty-two".