253731287 has 2 divisors, whose sum is σ = 253731288. Its totient is φ = 253731286.

The previous prime is 253731281. The next prime is 253731323. The reversal of 253731287 is 782137352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 253731287 - 2⁶ = 253731223 is a prime.

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 253731287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253731281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126865643 + 126865644.

It is an arithmetic number, because the mean of its divisors is an integer number (126865644).

Almost surely, 2^253731287 is an apocalyptic number.

253731287 is a deficient number, since it is larger than the sum of its proper divisors (1).

253731287 is an equidigital number, since it uses as much as digits as its factorization.

253731287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 38.

The square root of 253731287 is about 15928.9449430902. The cubic root of 253731287 is about 633.0791454255.

The spelling of 253731287 in words is "two hundred fifty-three million, seven hundred thirty-one thousand, two hundred eighty-seven".