52215515 has 32 divisors (see below), whose sum is σ = 74476800. Its totient is φ = 34715520.

The previous prime is 52215511. The next prime is 52215529. The reversal of 52215515 is 51551225.

It is not a de Polignac number, because 52215515 - 2² = 52215511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52215511) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 29444 + ... + 31166.

It is an arithmetic number, because the mean of its divisors is an integer number (2327400).

Almost surely, 2^52215515 is an apocalyptic number.

52215515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

52215515 is a deficient number, since it is larger than the sum of its proper divisors (22261285).

52215515 is a wasteful number, since it uses less digits than its factorization.

52215515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1787.

The product of its digits is 2500, while the sum is 26.

The square root of 52215515 is about 7226.0303763546. The cubic root of 52215515 is about 373.7660537543.

The spelling of 52215515 in words is "fifty-two million, two hundred fifteen thousand, five hundred fifteen".