55869553 has 8 divisors (see below), whose sum is σ = 58373568. Its totient is φ = 53371824.

The previous prime is 55869529. The next prime is 55869571. The reversal of 55869553 is 35596855.

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 55869553 - 2¹³ = 55861361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55869503) 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, 33526 + ... + 35152.

It is an arithmetic number, because the mean of its divisors is an integer number (7296696).

Almost surely, 2^55869553 is an apocalyptic number.

It is an amenable number.

55869553 is a deficient number, since it is larger than the sum of its proper divisors (2504015).

55869553 is a wasteful number, since it uses less digits than its factorization.

55869553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143.

The product of its digits is 810000, while the sum is 46.

The square root of 55869553 is about 7474.5938351191. The cubic root of 55869553 is about 382.2889387658.

The spelling of 55869553 in words is "fifty-five million, eight hundred sixty-nine thousand, five hundred fifty-three".