55812288 has 112 divisors (see below), whose sum is σ = 170590464. Its totient is φ = 15774720.

The previous prime is 55812277. The next prime is 55812299. The reversal of 55812288 is 88221855.

It is an interprime number because it is at equal distance from previous prime (55812277) and next prime (55812299).

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×55812288² = 6230022983589888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175906 + ... + 176222.

Almost surely, 2^55812288 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 55812288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85295232).

55812288 is an abundant number, since it is smaller than the sum of its proper divisors (114778176).

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

55812288 is a wasteful number, since it uses less digits than its factorization.

55812288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 460 counting only the distinct ones).

The product of its digits is 51200, while the sum is 39.

The square root of 55812288 is about 7470.7622101095. The cubic root of 55812288 is about 382.1582816745.

The spelling of 55812288 in words is "fifty-five million, eight hundred twelve thousand, two hundred eighty-eight".