55125400 has 48 divisors (see below), whose sum is σ = 139823640. Its totient is φ = 20044800.

The previous prime is 55125383. The next prime is 55125431. The reversal of 55125400 is 452155.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10329 + ... + 14728.

Almost surely, 2^55125400 is an apocalyptic number.

55125400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55125400 is an abundant number, since it is smaller than the sum of its proper divisors (84698240).

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

55125400 is a wasteful number, since it uses less digits than its factorization.

55125400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25084 (or 25075 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 55125400 is about 7424.6481398111. The cubic root of 55125400 is about 380.5840510824.

Adding to 55125400 its reverse (452155), we get a palindrome (55577555).

The spelling of 55125400 in words is "fifty-five million, one hundred twenty-five thousand, four hundred".