55499965 has 4 divisors (see below), whose sum is σ = 66599964. Its totient is φ = 44399968.

The previous prime is 55499959. The next prime is 55499993. The reversal of 55499965 is 56999455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56999455 = 5 ⋅11399891.

It can be written as a sum of positive squares in 2 ways, for example, as 26101881 + 29398084 = 5109^2 + 5422^2 .

It is a cyclic number.

It is not a de Polignac number, because 55499965 - 2⁹ = 55499453 is a prime.

It is a super-2 number, since 2×55499965² = 6160492230002450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5549992 + ... + 5550001.

It is an arithmetic number, because the mean of its divisors is an integer number (16649991).

Almost surely, 2^55499965 is an apocalyptic number.

It is an amenable number.

55499965 is a deficient number, since it is larger than the sum of its proper divisors (11099999).

55499965 is a wasteful number, since it uses less digits than its factorization.

55499965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11099998.

The product of its digits is 2187000, while the sum is 52.

The square root of 55499965 is about 7449.8298638291. The cubic root of 55499965 is about 381.4441011092. Note that the first 3 decimals are identical.

The spelling of 55499965 in words is "fifty-five million, four hundred ninety-nine thousand, nine hundred sixty-five".