55812732 has 12 divisors (see below), whose sum is σ = 130229736. Its totient is φ = 18604240.

The previous prime is 55812727. The next prime is 55812739. The reversal of 55812732 is 23721855.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×55812732² = 6230122106607648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55812693 and 55812702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55812739) 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, 2325519 + ... + 2325542.

It is an arithmetic number, because the mean of its divisors is an integer number (10852478).

Almost surely, 2^55812732 is an apocalyptic number.

It is an amenable number.

55812732 is an abundant number, since it is smaller than the sum of its proper divisors (74417004).

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

55812732 is a wasteful number, since it uses less digits than its factorization.

55812732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4651068 (or 4651066 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The square root of 55812732 is about 7470.7919258938. The cubic root of 55812732 is about 382.1592950584.

The spelling of 55812732 in words is "fifty-five million, eight hundred twelve thousand, seven hundred thirty-two".