253642231 has 2 divisors, whose sum is σ = 253642232. Its totient is φ = 253642230.

The previous prime is 253642201. The next prime is 253642247. The reversal of 253642231 is 132246352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253642231 - 2¹³ = 253634039 is a prime.

It is a super-2 number, since 2×253642231² = 128668762693314722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 253642231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253642201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126821115 + 126821116.

It is an arithmetic number, because the mean of its divisors is an integer number (126821116).

Almost surely, 2^253642231 is an apocalyptic number.

253642231 is a deficient number, since it is larger than the sum of its proper divisors (1).

253642231 is an equidigital number, since it uses as much as digits as its factorization.

253642231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 28.

The square root of 253642231 is about 15926.1492834897. The cubic root of 253642231 is about 633.0050695603.

Adding to 253642231 its reverse (132246352), we get a palindrome (385888583).

The spelling of 253642231 in words is "two hundred fifty-three million, six hundred forty-two thousand, two hundred thirty-one".