55250988 has 48 divisors (see below), whose sum is σ = 139826400. Its totient is φ = 16879104.

The previous prime is 55250981. The next prime is 55250989. The reversal of 55250988 is 88905255.

It is a super-2 number, since 2×55250988² = 6105343349952288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (55250981) 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, 22056 + ... + 24432.

It is an arithmetic number, because the mean of its divisors is an integer number (2913050).

Almost surely, 2^55250988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55250988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69913200).

55250988 is an abundant number, since it is smaller than the sum of its proper divisors (84575412).

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

55250988 is a wasteful number, since it uses less digits than its factorization.

55250988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546 (or 2544 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 42.

The square root of 55250988 is about 7433.1008334342. The cubic root of 55250988 is about 380.8728504285.

The spelling of 55250988 in words is "fifty-five million, two hundred fifty thousand, nine hundred eighty-eight".