55155328 has 32 divisors (see below), whose sum is σ = 115668000. Its totient is φ = 26125056.

The previous prime is 55155307. The next prime is 55155343. The reversal of 55155328 is 82355155.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×55155328² = 6084220413575168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55155293 and 55155302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8908 + ... + 13771.

It is an arithmetic number, because the mean of its divisors is an integer number (3614625).

Almost surely, 2^55155328 is an apocalyptic number.

It is an amenable number.

55155328 is an abundant number, since it is smaller than the sum of its proper divisors (60512672).

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

55155328 is a wasteful number, since it uses less digits than its factorization.

55155328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22712 (or 22700 counting only the distinct ones).

The product of its digits is 30000, while the sum is 34.

The square root of 55155328 is about 7426.6633153793. The cubic root of 55155328 is about 380.6529126166.

The spelling of 55155328 in words is "fifty-five million, one hundred fifty-five thousand, three hundred twenty-eight".