55504553 has 8 divisors (see below), whose sum is σ = 60080328. Its totient is φ = 50972544.

The previous prime is 55504549. The next prime is 55504573. The reversal of 55504553 is 35540555.

It can be written as a sum of positive squares in 4 ways, for example, as 31719424 + 23785129 = 5632^2 + 4877^2 .

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 55504553 - 2² = 55504549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55504513) 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, 8276 + ... + 13397.

It is an arithmetic number, because the mean of its divisors is an integer number (7510041).

Almost surely, 2^55504553 is an apocalyptic number.

It is an amenable number.

55504553 is a deficient number, since it is larger than the sum of its proper divisors (4575775).

55504553 is a wasteful number, since it uses less digits than its factorization.

55504553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21883.

The product of its (nonzero) digits is 37500, while the sum is 32.

The square root of 55504553 is about 7450.1377839608. The cubic root of 55504553 is about 381.4546117303.

The spelling of 55504553 in words is "fifty-five million, five hundred four thousand, five hundred fifty-three".