55205597 has 4 divisors (see below), whose sum is σ = 55273020. Its totient is φ = 55138176.

The previous prime is 55205587. The next prime is 55205599. The reversal of 55205597 is 79550255.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26357956 + 28847641 = 5134^2 + 5371^2 .

It is a cyclic number.

It is not a de Polignac number, because 55205597 - 2²² = 51011293 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 55205597.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55205599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32468 + ... + 34125.

It is an arithmetic number, because the mean of its divisors is an integer number (13818255).

Almost surely, 2^55205597 is an apocalyptic number.

It is an amenable number.

55205597 is a deficient number, since it is larger than the sum of its proper divisors (67423).

55205597 is an equidigital number, since it uses as much as digits as its factorization.

55205597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67422.

The product of its (nonzero) digits is 78750, while the sum is 38.

The square root of 55205597 is about 7430.0469042934. The cubic root of 55205597 is about 380.7685208550.

The spelling of 55205597 in words is "fifty-five million, two hundred five thousand, five hundred ninety-seven".