252121030 has 16 divisors (see below), whose sum is σ = 518649120. Its totient is φ = 86441472.

The previous prime is 252121007. The next prime is 252121063. The reversal of 252121030 is 30121252.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 252120995 and 252121013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1800795 + ... + 1800934.

It is an arithmetic number, because the mean of its divisors is an integer number (32415570).

Almost surely, 2^252121030 is an apocalyptic number.

252121030 is an abundant number, since it is smaller than the sum of its proper divisors (266528090).

252121030 is a wasteful number, since it uses less digits than its factorization.

252121030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601743.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 252121030 is about 15878.3194954630. The cubic root of 252121030 is about 631.7370638197.

Adding to 252121030 its reverse (30121252), we get a palindrome (282242282).

The spelling of 252121030 in words is "two hundred fifty-two million, one hundred twenty-one thousand, thirty".