252420731 has 2 divisors, whose sum is σ = 252420732. Its totient is φ = 252420730.

The previous prime is 252420713. The next prime is 252420739. The reversal of 252420731 is 137024252.

Together with previous prime (252420713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 252420731 - 2¹⁰ = 252419707 is a prime.

It is a super-2 number, since 2×252420731² = 127432450877148722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 252420731.

It is not a weakly prime, because it can be changed into another prime (252420739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126210365 + 126210366.

It is an arithmetic number, because the mean of its divisors is an integer number (126210366).

Almost surely, 2^252420731 is an apocalyptic number.

252420731 is a deficient number, since it is larger than the sum of its proper divisors (1).

252420731 is an equidigital number, since it uses as much as digits as its factorization.

252420731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 252420731 is about 15887.7541207057. The cubic root of 252420731 is about 631.9872839334.

Adding to 252420731 its reverse (137024252), we get a palindrome (389444983).

The spelling of 252420731 in words is "two hundred fifty-two million, four hundred twenty thousand, seven hundred thirty-one".