55556724 has 12 divisors (see below), whose sum is σ = 129632384. Its totient is φ = 18518904.

The previous prime is 55556717. The next prime is 55556747. The reversal of 55556724 is 42765555.

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

It is a super-2 number, since 2×55556724² = 6173099163224352, which contains 22 as substring.

It is a congruent number.

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, 2314852 + ... + 2314875.

Almost surely, 2^55556724 is an apocalyptic number.

It is an amenable number.

55556724 is an abundant number, since it is smaller than the sum of its proper divisors (74075660).

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

55556724 is a wasteful number, since it uses less digits than its factorization.

55556724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4629734 (or 4629732 counting only the distinct ones).

The product of its digits is 210000, while the sum is 39.

The square root of 55556724 is about 7453.6383062233. The cubic root of 55556724 is about 381.5740892357.

It can be divided in two parts, 55556 and 724, that added together give a triangular number (56280 = T₃₃₅).

The spelling of 55556724 in words is "fifty-five million, five hundred fifty-six thousand, seven hundred twenty-four".