55015565 has 16 divisors (see below), whose sum is σ = 72164736. Its totient is φ = 39931200.

The previous prime is 55015549. The next prime is 55015567. The reversal of 55015565 is 56551055.

It is not a de Polignac number, because 55015565 - 2⁴ = 55015549 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55015567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51224 + ... + 52286.

It is an arithmetic number, because the mean of its divisors is an integer number (4510296).

Almost surely, 2^55015565 is an apocalyptic number.

55015565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55015565 is a deficient number, since it is larger than the sum of its proper divisors (17149171).

55015565 is a wasteful number, since it uses less digits than its factorization.

55015565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 55015565 is about 7417.2478049476. The cubic root of 55015565 is about 380.3311172107.

The spelling of 55015565 in words is "fifty-five million, fifteen thousand, five hundred sixty-five".