252246991 has 2 divisors, whose sum is σ = 252246992. Its totient is φ = 252246990.

The previous prime is 252246977. The next prime is 252246997. The reversal of 252246991 is 199642252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 252246991 - 2⁹ = 252246479 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 (252246997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126123495 + 126123496.

It is an arithmetic number, because the mean of its divisors is an integer number (126123496).

Almost surely, 2^252246991 is an apocalyptic number.

252246991 is a deficient number, since it is larger than the sum of its proper divisors (1).

252246991 is an equidigital number, since it uses as much as digits as its factorization.

252246991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 252246991 is about 15882.2854463707. The cubic root of 252246991 is about 631.8422526968.

The spelling of 252246991 in words is "two hundred fifty-two million, two hundred forty-six thousand, nine hundred ninety-one".