55647232 has 44 divisors (see below), whose sum is σ = 114894016. Its totient is φ = 26910720.

The previous prime is 55647211. The next prime is 55647233. The reversal of 55647232 is 23274655.

It is a super-2 number, since 2×55647232² = 6193228858523648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55647233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30868 + ... + 32620.

Almost surely, 2^55647232 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 55647232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57447008).

55647232 is an abundant number, since it is smaller than the sum of its proper divisors (59246784).

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

55647232 is a wasteful number, since it uses less digits than its factorization.

55647232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804 (or 1786 counting only the distinct ones).

The product of its digits is 50400, while the sum is 34.

The square root of 55647232 is about 7459.7072328611. The cubic root of 55647232 is about 381.7811855035.

The spelling of 55647232 in words is "fifty-five million, six hundred forty-seven thousand, two hundred thirty-two".