253831 has 6 divisors (see below), whose sum is σ = 261896. Its totient is φ = 246000.

The previous prime is 253823. The next prime is 253853. The reversal of 253831 is 138352.

It is not a de Polignac number, because 253831 - 2³ = 253823 is a prime.

It is a super-2 number, since 2×253831² = 128860353122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253801) 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 5 ways as a sum of consecutive naturals, for example, 1606 + ... + 1756.

2²⁵³⁸³¹ is an apocalyptic number.

253831 is a deficient number, since it is larger than the sum of its proper divisors (8065).

253831 is an equidigital number, since it uses as much as digits as its factorization.

253831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 192 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 253831 is about 503.8164348252. The cubic root of 253831 is about 63.3162065108.

The spelling of 253831 in words is "two hundred fifty-three thousand, eight hundred thirty-one".