252536491 has 2 divisors, whose sum is σ = 252536492. Its totient is φ = 252536490.

The previous prime is 252536489. The next prime is 252536503. The reversal of 252536491 is 194635252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252536491 - 2¹ = 252536489 is a prime.

Together with 252536489, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 252536491.

It is not a weakly prime, because it can be changed into another prime (252536591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126268245 + 126268246.

It is an arithmetic number, because the mean of its divisors is an integer number (126268246).

Almost surely, 2^252536491 is an apocalyptic number.

252536491 is a deficient number, since it is larger than the sum of its proper divisors (1).

252536491 is an equidigital number, since it uses as much as digits as its factorization.

252536491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 37.

The square root of 252536491 is about 15891.3967605116. The cubic root of 252536491 is about 632.0838788354.

The spelling of 252536491 in words is "two hundred fifty-two million, five hundred thirty-six thousand, four hundred ninety-one".