55503250 has 32 divisors (see below), whose sum is σ = 113353344. Its totient is φ = 20182000.

The previous prime is 55503223. The next prime is 55503251. The reversal of 55503250 is 5230555.

It is a super-2 number, since 2×55503250² = 6161221521125000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (55503251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7342 + ... + 12841.

It is an arithmetic number, because the mean of its divisors is an integer number (3542292).

Almost surely, 2^55503250 is an apocalyptic number.

55503250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55503250 is an abundant number, since it is smaller than the sum of its proper divisors (57850094).

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

55503250 is a wasteful number, since it uses less digits than its factorization.

55503250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20211 (or 20201 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 25.

The square root of 55503250 is about 7450.0503354004. The cubic root of 55503250 is about 381.4516267545.

It can be divided in two parts, 55 and 503250, that added together give a palindrome (503305).

The spelling of 55503250 in words is "fifty-five million, five hundred three thousand, two hundred fifty".