253531 has 2 divisors, whose sum is σ = 253532. Its totient is φ = 253530.

The previous prime is 253507. The next prime is 253537. The reversal of 253531 is 135352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253531 - 2¹¹ = 251483 is a prime.

It is a super-2 number, since 2×253531² = 128555935922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 253499 and 253508.

It is not a weakly prime, because it can be changed into another prime (253537) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126765 + 126766.

It is an arithmetic number, because the mean of its divisors is an integer number (126766).

2²⁵³⁵³¹ is an apocalyptic number.

253531 is a deficient number, since it is larger than the sum of its proper divisors (1).

253531 is an equidigital number, since it uses as much as digits as its factorization.

253531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 450, while the sum is 19.

The square root of 253531 is about 503.5186193181. The cubic root of 253531 is about 63.2912524401.

Adding to 253531 its reverse (135352), we get a palindrome (388883).

It can be divided in two parts, 253 and 531, that added together give a square (784 = 28²).

The spelling of 253531 in words is "two hundred fifty-three thousand, five hundred thirty-one".