52021215 has 24 divisors (see below), whose sum is σ = 93281760. Its totient is φ = 26787264.

The previous prime is 52021201. The next prime is 52021219. The reversal of 52021215 is 51212025.

It is not a de Polignac number, because 52021215 - 2¹⁰ = 52020191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52021219) 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 23 ways as a sum of consecutive naturals, for example, 18627 + ... + 21236.

It is an arithmetic number, because the mean of its divisors is an integer number (3886740).

Almost surely, 2^52021215 is an apocalyptic number.

52021215 is a deficient number, since it is larger than the sum of its proper divisors (41260545).

52021215 is a wasteful number, since it uses less digits than its factorization.

52021215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39903 (or 39900 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 52021215 is about 7212.5733965070. The cubic root of 52021215 is about 373.3018685394.

The spelling of 52021215 in words is "fifty-two million, twenty-one thousand, two hundred fifteen".