253646513 has 2 divisors, whose sum is σ = 253646514. Its totient is φ = 253646512.

The previous prime is 253646473. The next prime is 253646521. The reversal of 253646513 is 315646352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146482609 + 107163904 = 12103^2 + 10352^2 .

It is a cyclic number.

It is not a de Polignac number, because 253646513 - 2¹⁴ = 253630129 is a prime.

It is not a weakly prime, because it can be changed into another prime (253646543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126823256 + 126823257.

It is an arithmetic number, because the mean of its divisors is an integer number (126823257).

Almost surely, 2^253646513 is an apocalyptic number.

It is an amenable number.

253646513 is a deficient number, since it is larger than the sum of its proper divisors (1).

253646513 is an equidigital number, since it uses as much as digits as its factorization.

253646513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 35.

The square root of 253646513 is about 15926.2837159207. The cubic root of 253646513 is about 633.0086316807.

The spelling of 253646513 in words is "two hundred fifty-three million, six hundred forty-six thousand, five hundred thirteen".