52870221 has 48 divisors (see below), whose sum is σ = 85183488. Its totient is φ = 31449600.

The previous prime is 52870201. The next prime is 52870229. The reversal of 52870221 is 12207825.

It is not a de Polignac number, because 52870221 - 2⁷ = 52870093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52870229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 336675 + ... + 336831.

It is an arithmetic number, because the mean of its divisors is an integer number (1774656).

Almost surely, 2^52870221 is an apocalyptic number.

52870221 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

52870221 is a deficient number, since it is larger than the sum of its proper divisors (32313267).

52870221 is a wasteful number, since it uses less digits than its factorization.

52870221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 52870221 is about 7271.1911678899. The cubic root of 52870221 is about 375.3217292285.

The spelling of 52870221 in words is "fifty-two million, eight hundred seventy thousand, two hundred twenty-one".