253235531 has 2 divisors, whose sum is σ = 253235532. Its totient is φ = 253235530.

The previous prime is 253235513. The next prime is 253235539. The reversal of 253235531 is 135532352.

Together with previous prime (253235513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253235531 - 2¹⁴ = 253219147 is a prime.

It is a super-2 number, since 2×253235531² = 128256468321703922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 253235494 and 253235503.

It is not a weakly prime, because it can be changed into another prime (253235539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126617765 + 126617766.

It is an arithmetic number, because the mean of its divisors is an integer number (126617766).

Almost surely, 2^253235531 is an apocalyptic number.

253235531 is a deficient number, since it is larger than the sum of its proper divisors (1).

253235531 is an equidigital number, since it uses as much as digits as its factorization.

253235531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 29.

The square root of 253235531 is about 15913.3758517795. The cubic root of 253235531 is about 632.6665601020. Note that the first 3 decimals are identical.

Adding to 253235531 its reverse (135532352), we get a palindrome (388767883).

The spelling of 253235531 in words is "two hundred fifty-three million, two hundred thirty-five thousand, five hundred thirty-one".