252111439449 has 27 divisors (see below), whose sum is σ = 376356744309. Its totient is φ = 162622415160.

The previous prime is 252111439399. The next prime is 252111439513. The reversal of 252111439449 is 944934111252.

The square root of 252111439449 is 502107.

It is a perfect power (a square), and thus also a powerful number.

252111439449 is a `hidden beast` number, since 2 + 5 + 211 + 1 + 4 + 394 + 49 = 666.

It is not a de Polignac number, because 252111439449 - 2⁹ = 252111438937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252111439249) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 46693252 + ... + 46698650.

Almost surely, 2^252111439449 is an apocalyptic number.

252111439449 is the 502107-th square number.

252111439449 is the 251054-th centered octagonal number.

It is an amenable number.

252111439449 is a deficient number, since it is larger than the sum of its proper divisors (124245304860).

252111439449 is an frugal number, since it uses more digits than its factorization.

252111439449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10866 (or 5433 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 252111439449 in words is "two hundred fifty-two billion, one hundred eleven million, four hundred thirty-nine thousand, four hundred forty-nine".