252509731 has 2 divisors, whose sum is σ = 252509732. Its totient is φ = 252509730.

The previous prime is 252509713. The next prime is 252509749. The reversal of 252509731 is 137905252.

Together with previous prime (252509713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (252509713) and next prime (252509749).

It is a cyclic number.

It is not a de Polignac number, because 252509731 - 2¹³ = 252501539 is a prime.

It is a super-2 number, since 2×252509731² = 127522328499384722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (252509711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126254865 + 126254866.

It is an arithmetic number, because the mean of its divisors is an integer number (126254866).

Almost surely, 2^252509731 is an apocalyptic number.

252509731 is a deficient number, since it is larger than the sum of its proper divisors (1).

252509731 is an equidigital number, since it uses as much as digits as its factorization.

252509731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 252509731 is about 15890.5547731978. The cubic root of 252509731 is about 632.0615518151.

The spelling of 252509731 in words is "two hundred fifty-two million, five hundred nine thousand, seven hundred thirty-one".