55232400 has 60 divisors (see below), whose sum is σ = 176931632. Its totient is φ = 14728320.

The previous prime is 55232383. The next prime is 55232431. The reversal of 55232400 is 423255.

It is a tau number, because it is divible by the number of its divisors (60).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21814 + ... + 24213.

Almost surely, 2^55232400 is an apocalyptic number.

55232400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55232400 is an abundant number, since it is smaller than the sum of its proper divisors (121699232).

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

55232400 is a wasteful number, since it uses less digits than its factorization.

55232400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46048 (or 46037 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 55232400 is about 7431.8503752430. The cubic root of 55232400 is about 380.8301334933.

Adding to 55232400 its reverse (423255), we get a palindrome (55655655).

The spelling of 55232400 in words is "fifty-five million, two hundred thirty-two thousand, four hundred".