252780530 has 16 divisors (see below), whose sum is σ = 470695320. Its totient is φ = 97625472.

The previous prime is 252780529. The next prime is 252780533. The reversal of 252780530 is 35087252.

It can be written as a sum of positive squares in 4 ways, for example, as 198330889 + 54449641 = 14083^2 + 7379^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (252780533) 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, 435539 + ... + 436118.

Almost surely, 2^252780530 is an apocalyptic number.

252780530 is a deficient number, since it is larger than the sum of its proper divisors (217914790).

252780530 is a wasteful number, since it uses less digits than its factorization.

252780530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871693.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 252780530 is about 15899.0732434315. The cubic root of 252780530 is about 632.2874183399.

The spelling of 252780530 in words is "two hundred fifty-two million, seven hundred eighty thousand, five hundred thirty".