253975281 has 24 divisors (see below), whose sum is σ = 406635264. Its totient is φ = 140444640.

The previous prime is 253975273. The next prime is 253975303. The reversal of 253975281 is 182579352.

It is a happy number.

It is not a de Polignac number, because 253975281 - 2³ = 253975273 is a prime.

It is a super-2 number, since 2×253975281² = 129006886718057922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253975181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23310 + ... + 32423.

It is an arithmetic number, because the mean of its divisors is an integer number (16943136).

Almost surely, 2^253975281 is an apocalyptic number.

253975281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

253975281 is a deficient number, since it is larger than the sum of its proper divisors (152659983).

253975281 is a wasteful number, since it uses less digits than its factorization.

253975281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55781 (or 55774 counting only the distinct ones).

The product of its digits is 151200, while the sum is 42.

The square root of 253975281 is about 15936.6019276382. The cubic root of 253975281 is about 633.2820083677.

The spelling of 253975281 in words is "two hundred fifty-three million, nine hundred seventy-five thousand, two hundred eighty-one".