252557399 has 2 divisors, whose sum is σ = 252557400. Its totient is φ = 252557398.

The previous prime is 252557381. The next prime is 252557429. The reversal of 252557399 is 993755252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252557399 - 2²⁴ = 235780183 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252557369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126278699 + 126278700.

It is an arithmetic number, because the mean of its divisors is an integer number (126278700).

Almost surely, 2^252557399 is an apocalyptic number.

252557399 is a deficient number, since it is larger than the sum of its proper divisors (1).

252557399 is an equidigital number, since it uses as much as digits as its factorization.

252557399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 850500, while the sum is 47.

The square root of 252557399 is about 15892.0545871199. The cubic root of 252557399 is about 632.1013221825.

The spelling of 252557399 in words is "two hundred fifty-two million, five hundred fifty-seven thousand, three hundred ninety-nine".