55247328 has 36 divisors (see below), whose sum is σ = 157110408. Its totient is φ = 18415680.

The previous prime is 55247321. The next prime is 55247341. The reversal of 55247328 is 82374255.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×55247328² = 6104534502279168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55247292 and 55247301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55247321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95628 + ... + 96203.

It is an arithmetic number, because the mean of its divisors is an integer number (4364178).

Almost surely, 2^55247328 is an apocalyptic number.

It is an amenable number.

55247328 is an abundant number, since it is smaller than the sum of its proper divisors (101863080).

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

55247328 is a wasteful number, since it uses less digits than its factorization.

55247328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191847 (or 191836 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 55247328 is about 7432.8546333155. The cubic root of 55247328 is about 380.8644401692.

The spelling of 55247328 in words is "fifty-five million, two hundred forty-seven thousand, three hundred twenty-eight".