253213281 has 6 divisors (see below), whose sum is σ = 365752530. Its totient is φ = 168808848.

The previous prime is 253213231. The next prime is 253213307. The reversal of 253213281 is 182312352.

It can be written as a sum of positive squares in only one way, i.e., 170694225 + 82519056 = 13065^2 + 9084^2 .

It is not a de Polignac number, because 253213281 - 2⁶ = 253213217 is a prime.

It is a super-2 number, since 2×253213281² = 128233931349569922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253213231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14067396 + ... + 14067413.

It is an arithmetic number, because the mean of its divisors is an integer number (60958755).

Almost surely, 2^253213281 is an apocalyptic number.

It is an amenable number.

253213281 is a deficient number, since it is larger than the sum of its proper divisors (112539249).

253213281 is a wasteful number, since it uses less digits than its factorization.

253213281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28134815 (or 28134812 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 253213281 is about 15912.6767390028. The cubic root of 253213281 is about 632.6480302598.

The spelling of 253213281 in words is "two hundred fifty-three million, two hundred thirteen thousand, two hundred eighty-one".