253855681 has 8 divisors (see below), whose sum is σ = 257170464. Its totient is φ = 250558560.

The previous prime is 253855649. The next prime is 253855691. The reversal of 253855681 is 186558352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253855681 - 2⁵ = 253855649 is a prime.

It is a super-2 number, since 2×253855681² = 128885413551947522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253855691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25846 + ... + 34288.

It is an arithmetic number, because the mean of its divisors is an integer number (32146308).

Almost surely, 2^253855681 is an apocalyptic number.

It is an amenable number.

253855681 is a deficient number, since it is larger than the sum of its proper divisors (3314783).

253855681 is a wasteful number, since it uses less digits than its factorization.

253855681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8831.

The product of its digits is 288000, while the sum is 43.

The square root of 253855681 is about 15932.8491174680. The cubic root of 253855681 is about 633.1825860669.

The spelling of 253855681 in words is "two hundred fifty-three million, eight hundred fifty-five thousand, six hundred eighty-one".