252156660 has 96 divisors (see below), whose sum is σ = 813238272. Its totient is φ = 57183360.

The previous prime is 252156649. The next prime is 252156691. The reversal of 252156660 is 66651252.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52729 + ... + 57311.

It is an arithmetic number, because the mean of its divisors is an integer number (8471232).

Almost surely, 2^252156660 is an apocalyptic number.

252156660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 252156660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406619136).

252156660 is an abundant number, since it is smaller than the sum of its proper divisors (561081612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252156660 is a wasteful number, since it uses less digits than its factorization.

252156660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4733 (or 4731 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 252156660 is about 15879.4414259444. The cubic root of 252156660 is about 631.7668216591.

The spelling of 252156660 in words is "two hundred fifty-two million, one hundred fifty-six thousand, six hundred sixty".