252621730 has 16 divisors (see below), whose sum is σ = 454916160. Its totient is φ = 101004912.

The previous prime is 252621709. The next prime is 252621737. The reversal of 252621730 is 37126252.

It is not an unprimeable number, because it can be changed into a prime (252621737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29251 + ... + 36889.

It is an arithmetic number, because the mean of its divisors is an integer number (28432260).

Almost surely, 2^252621730 is an apocalyptic number.

252621730 is a deficient number, since it is larger than the sum of its proper divisors (202294430).

252621730 is a wasteful number, since it uses less digits than its factorization.

252621730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10953.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 252621730 is about 15894.0784570858. The cubic root of 252621730 is about 632.1549868916.

Adding to 252621730 its reverse (37126252), we get a palindrome (289747982).

The spelling of 252621730 in words is "two hundred fifty-two million, six hundred twenty-one thousand, seven hundred thirty".