55421250 has 40 divisors (see below), whose sum is σ = 138518160. Its totient is φ = 14778000.

The previous prime is 55421231. The next prime is 55421257. The reversal of 55421250 is 5212455.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55421250.

It is not an unprimeable number, because it can be changed into a prime (55421257) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3640 + ... + 11139.

It is an arithmetic number, because the mean of its divisors is an integer number (3462954).

Almost surely, 2^55421250 is an apocalyptic number.

55421250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55421250 is an abundant number, since it is smaller than the sum of its proper divisors (83096910).

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

55421250 is a wasteful number, since it uses less digits than its factorization.

55421250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14804 (or 14789 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 55421250 is about 7444.5449827374. The cubic root of 55421250 is about 381.2636831065.

The spelling of 55421250 in words is "fifty-five million, four hundred twenty-one thousand, two hundred fifty".