253533431 has 2 divisors, whose sum is σ = 253533432. Its totient is φ = 253533430.

The previous prime is 253533419. The next prime is 253533451. The reversal of 253533431 is 134335352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 253533431 - 2²² = 249339127 is a prime.

It is a super-2 number, since 2×253533431² = 128558401269263522, 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 = 253533394 and 253533403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253533451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126766715 + 126766716.

It is an arithmetic number, because the mean of its divisors is an integer number (126766716).

Almost surely, 2^253533431 is an apocalyptic number.

253533431 is a deficient number, since it is larger than the sum of its proper divisors (1).

253533431 is an equidigital number, since it uses as much as digits as its factorization.

253533431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 29.

The square root of 253533431 is about 15922.7331510642. The cubic root of 253533431 is about 632.9145473038.

Adding to 253533431 its reverse (134335352), we get a palindrome (387868783).

The spelling of 253533431 in words is "two hundred fifty-three million, five hundred thirty-three thousand, four hundred thirty-one".