52621215 has 32 divisors (see below), whose sum is σ = 87989760. Its totient is φ = 26826624.

The previous prime is 52621213. The next prime is 52621243. The reversal of 52621215 is 51212625.

It is a happy number.

It is not a de Polignac number, because 52621215 - 2¹ = 52621213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52621213) 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, 31942 + ... + 33548.

It is an arithmetic number, because the mean of its divisors is an integer number (2749680).

Almost surely, 2^52621215 is an apocalyptic number.

52621215 is a deficient number, since it is larger than the sum of its proper divisors (35368545).

52621215 is a wasteful number, since it uses less digits than its factorization.

52621215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711.

The product of its digits is 1200, while the sum is 24.

The square root of 52621215 is about 7254.0481801543. The cubic root of 52621215 is about 374.7315767987.

The spelling of 52621215 in words is "fifty-two million, six hundred twenty-one thousand, two hundred fifteen".