253691841 has 16 divisors (see below), whose sum is σ = 366013760. Its totient is φ = 155373120.

The previous prime is 253691827. The next prime is 253691843. The reversal of 253691841 is 148196352.

It is not a de Polignac number, because 253691841 - 2¹⁸ = 253429697 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253691841.

It is not an unprimeable number, because it can be changed into a prime (253691843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7186 + ... + 23643.

It is an arithmetic number, because the mean of its divisors is an integer number (22875860).

Almost surely, 2^253691841 is an apocalyptic number.

It is an amenable number.

253691841 is a deficient number, since it is larger than the sum of its proper divisors (112321919).

253691841 is a wasteful number, since it uses less digits than its factorization.

253691841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31056.

The product of its digits is 51840, while the sum is 39.

The square root of 253691841 is about 15927.7067087513. The cubic root of 253691841 is about 633.0463367870.

The spelling of 253691841 in words is "two hundred fifty-three million, six hundred ninety-one thousand, eight hundred forty-one".