253240357 has 2 divisors, whose sum is σ = 253240358. Its totient is φ = 253240356.

The previous prime is 253240349. The next prime is 253240363. The reversal of 253240357 is 753042352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184117761 + 69122596 = 13569^2 + 8314^2 .

It is a cyclic number.

It is not a de Polignac number, because 253240357 - 2³ = 253240349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253240367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126620178 + 126620179.

It is an arithmetic number, because the mean of its divisors is an integer number (126620179).

Almost surely, 2^253240357 is an apocalyptic number.

It is an amenable number.

253240357 is a deficient number, since it is larger than the sum of its proper divisors (1).

253240357 is an equidigital number, since it uses as much as digits as its factorization.

253240357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 31.

The square root of 253240357 is about 15913.5274845020. The cubic root of 253240357 is about 632.6705790607.

The spelling of 253240357 in words is "two hundred fifty-three million, two hundred forty thousand, three hundred fifty-seven".