55372500 has 180 divisors, whose sum is σ = 184216032. Its totient is φ = 13992000.

The previous prime is 55372489. The next prime is 55372511. The reversal of 55372500 is 527355.

It is an interprime number because it is at equal distance from previous prime (55372489) and next prime (55372511).

It is a tau number, because it is divible by the number of its divisors (180).

It is a super-2 number, since 2×55372500² = 6132227512500000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 517447 + ... + 517553.

Almost surely, 2^55372500 is an apocalyptic number.

55372500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55372500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92108016).

55372500 is an abundant number, since it is smaller than the sum of its proper divisors (128843532).

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

55372500 is a wasteful number, since it uses less digits than its factorization.

55372500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 27.

The square root of 55372500 is about 7441.2700528875. The cubic root of 55372500 is about 381.1518604334.

Adding to 55372500 its reverse (527355), we get a palindrome (55899855).

The spelling of 55372500 in words is "fifty-five million, three hundred seventy-two thousand, five hundred".