55513632 has 24 divisors (see below), whose sum is σ = 145723536. Its totient is φ = 18504512.

The previous prime is 55513621. The next prime is 55513643. The reversal of 55513632 is 23631555.

It is an interprime number because it is at equal distance from previous prime (55513621) and next prime (55513643).

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 55513632.

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, 289038 + ... + 289229.

It is an arithmetic number, because the mean of its divisors is an integer number (6071814).

Almost surely, 2^55513632 is an apocalyptic number.

It is an amenable number.

55513632 is an abundant number, since it is smaller than the sum of its proper divisors (90209904).

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

55513632 is a wasteful number, since it uses less digits than its factorization.

55513632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578280 (or 578272 counting only the distinct ones).

The product of its digits is 13500, while the sum is 30.

The square root of 55513632 is about 7450.7470766360. The cubic root of 55513632 is about 381.4754090488.

The spelling of 55513632 in words is "fifty-five million, five hundred thirteen thousand, six hundred thirty-two".