55604521 has 8 divisors (see below), whose sum is σ = 63669824. Its totient is φ = 47569680.

The previous prime is 55604519. The next prime is 55604531. The reversal of 55604521 is 12540655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55604521 - 2¹ = 55604519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55604521.

It is not an unprimeable number, because it can be changed into a prime (55604531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3555 + ... + 11128.

It is an arithmetic number, because the mean of its divisors is an integer number (7958728).

Almost surely, 2^55604521 is an apocalyptic number.

It is an amenable number.

55604521 is a deficient number, since it is larger than the sum of its proper divisors (8065303).

55604521 is a wasteful number, since it uses less digits than its factorization.

55604521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15231.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 55604521 is about 7456.8439034219. The cubic root of 55604521 is about 381.6834841489.

The spelling of 55604521 in words is "fifty-five million, six hundred four thousand, five hundred twenty-one".