252799821 has 12 divisors (see below), whose sum is σ = 367575520. Its totient is φ = 167416200.

The previous prime is 252799787. The next prime is 252799847. The reversal of 252799821 is 128997252.

It is a happy number.

It is not a de Polignac number, because 252799821 - 2¹⁰ = 252798797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252799861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91651 + ... + 94368.

Almost surely, 2^252799821 is an apocalyptic number.

It is an amenable number.

252799821 is a deficient number, since it is larger than the sum of its proper divisors (114775699).

252799821 is a wasteful number, since it uses less digits than its factorization.

252799821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186176 (or 186173 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 252799821 is about 15899.6799024383. The cubic root of 252799821 is about 632.3035023138.

The spelling of 252799821 in words is "two hundred fifty-two million, seven hundred ninety-nine thousand, eight hundred twenty-one".