55320375 has 32 divisors (see below), whose sum is σ = 100429056. Its totient is φ = 26820000.

The previous prime is 55320341. The next prime is 55320379. The reversal of 55320375 is 57302355.

It is not a de Polignac number, because 55320375 - 2¹⁰ = 55319351 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55320379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2581 + ... + 10830.

It is an arithmetic number, because the mean of its divisors is an integer number (3138408).

Almost surely, 2^55320375 is an apocalyptic number.

55320375 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55320375 is a deficient number, since it is larger than the sum of its proper divisors (45108681).

55320375 is a wasteful number, since it uses less digits than its factorization.

55320375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13440 (or 13430 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 30.

The square root of 55320375 is about 7437.7668019373. The cubic root of 55320375 is about 381.0322235612.

The spelling of 55320375 in words is "fifty-five million, three hundred twenty thousand, three hundred seventy-five".