253965553 has 2 divisors, whose sum is σ = 253965554. Its totient is φ = 253965552.

The previous prime is 253965529. The next prime is 253965587. The reversal of 253965553 is 355569352.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216913984 + 37051569 = 14728^2 + 6087^2 .

It is a cyclic number.

It is not a de Polignac number, because 253965553 - 2²¹ = 251868401 is a prime.

It is a super-2 number, since 2×253965553² = 128997004221191618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (253965853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126982776 + 126982777.

It is an arithmetic number, because the mean of its divisors is an integer number (126982777).

Almost surely, 2^253965553 is an apocalyptic number.

It is an amenable number.

253965553 is a deficient number, since it is larger than the sum of its proper divisors (1).

253965553 is an equidigital number, since it uses as much as digits as its factorization.

253965553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 607500, while the sum is 43.

The square root of 253965553 is about 15936.2967153602. The cubic root of 253965553 is about 633.2739227435.

The spelling of 253965553 in words is "two hundred fifty-three million, nine hundred sixty-five thousand, five hundred fifty-three".