252523991 has 2 divisors, whose sum is σ = 252523992. Its totient is φ = 252523990.

The previous prime is 252523987. The next prime is 252524021. The reversal of 252523991 is 199325252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252523991 - 2² = 252523987 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 (252525991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126261995 + 126261996.

It is an arithmetic number, because the mean of its divisors is an integer number (126261996).

Almost surely, 2^252523991 is an apocalyptic number.

252523991 is a deficient number, since it is larger than the sum of its proper divisors (1).

252523991 is an equidigital number, since it uses as much as digits as its factorization.

252523991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 38.

The square root of 252523991 is about 15891.0034610782. The cubic root of 252523991 is about 632.0734497434.

The spelling of 252523991 in words is "two hundred fifty-two million, five hundred twenty-three thousand, nine hundred ninety-one".