55153565 has 4 divisors (see below), whose sum is σ = 66184284. Its totient is φ = 44122848.

The previous prime is 55153543. The next prime is 55153589. The reversal of 55153565 is 56535155.

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 41809156 + 13344409 = 6466^2 + 3653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55153565 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, 5515352 + ... + 5515361.

It is an arithmetic number, because the mean of its divisors is an integer number (16546071).

Almost surely, 2^55153565 is an apocalyptic number.

It is an amenable number.

55153565 is a deficient number, since it is larger than the sum of its proper divisors (11030719).

55153565 is a wasteful number, since it uses less digits than its factorization.

55153565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11030718.

The product of its digits is 56250, while the sum is 35.

The square root of 55153565 is about 7426.5446204813. The cubic root of 55153565 is about 380.6488568087.

The spelling of 55153565 in words is "fifty-five million, one hundred fifty-three thousand, five hundred sixty-five".