52215428 has 24 divisors (see below), whose sum is σ = 98642880. Its totient is φ = 24110240.

The previous prime is 52215409. The next prime is 52215433. The reversal of 52215428 is 82451225.

52215428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 52215428.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7118 + ... + 12453.

It is an arithmetic number, because the mean of its divisors is an integer number (4110120).

Almost surely, 2^52215428 is an apocalyptic number.

52215428 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

52215428 is a deficient number, since it is larger than the sum of its proper divisors (46427452).

52215428 is a wasteful number, since it uses less digits than its factorization.

52215428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19627 (or 19625 counting only the distinct ones).

The product of its digits is 6400, while the sum is 29.

The square root of 52215428 is about 7226.0243564494. The cubic root of 52215428 is about 373.7658461680.

The spelling of 52215428 in words is "fifty-two million, two hundred fifteen thousand, four hundred twenty-eight".