55201565 has 4 divisors (see below), whose sum is σ = 66241884. Its totient is φ = 44161248.

The previous prime is 55201543. The next prime is 55201579. The reversal of 55201565 is 56510255.

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 5555449 + 49646116 = 2357^2 + 7046^2 .

It is a cyclic number.

It is not a de Polignac number, because 55201565 - 2⁸ = 55201309 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 5520152 + ... + 5520161.

It is an arithmetic number, because the mean of its divisors is an integer number (16560471).

Almost surely, 2^55201565 is an apocalyptic number.

It is an amenable number.

55201565 is a deficient number, since it is larger than the sum of its proper divisors (11040319).

55201565 is a wasteful number, since it uses less digits than its factorization.

55201565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11040318.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 55201565 is about 7429.7755686158. The cubic root of 55201565 is about 380.7592506835.

The spelling of 55201565 in words is "fifty-five million, two hundred one thousand, five hundred sixty-five".