253931 has 4 divisors (see below), whose sum is σ = 260832. Its totient is φ = 247032.

The previous prime is 253919. The next prime is 253937. The reversal of 253931 is 139352.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 253931 - 2⁶ = 253867 is a prime.

It is a super-2 number, since 2×253931² = 128961905522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253897 and 253906.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 253931.

It is not an unprimeable number, because it can be changed into a prime (253937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3395 + ... + 3468.

It is an arithmetic number, because the mean of its divisors is an integer number (65208).

2²⁵³⁹³¹ is an apocalyptic number.

253931 is a deficient number, since it is larger than the sum of its proper divisors (6901).

253931 is an equidigital number, since it uses as much as digits as its factorization.

253931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6900.

The product of its digits is 810, while the sum is 23.

The square root of 253931 is about 503.9156675477. The cubic root of 253931 is about 63.3245201649.

The spelling of 253931 in words is "two hundred fifty-three thousand, nine hundred thirty-one".