252091243 has 2 divisors, whose sum is σ = 252091244. Its totient is φ = 252091242.

The previous prime is 252091207. The next prime is 252091261. The reversal of 252091243 is 342190252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 252091243 - 2²⁵ = 218536811 is a prime.

It is not a weakly prime, because it can be changed into another prime (252091643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126045621 + 126045622.

It is an arithmetic number, because the mean of its divisors is an integer number (126045622).

Almost surely, 2^252091243 is an apocalyptic number.

252091243 is a deficient number, since it is larger than the sum of its proper divisors (1).

252091243 is an equidigital number, since it uses as much as digits as its factorization.

252091243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 252091243 is about 15877.3814906615. The cubic root of 252091243 is about 631.7121838470.

Subtracting 252091243 from its reverse (342190252), we obtain a palindrome (90099009).

The spelling of 252091243 in words is "two hundred fifty-two million, ninety-one thousand, two hundred forty-three".