253145431 has 24 divisors (see below), whose sum is σ = 324817920. Its totient is φ = 193028880.

The previous prime is 253145423. The next prime is 253145441. The reversal of 253145431 is 134541352.

It is not a de Polignac number, because 253145431 - 2³ = 253145423 is a prime.

It is a super-2 number, since 2×253145431² = 128165218472351522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 253145431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253145401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36630 + ... + 42988.

It is an arithmetic number, because the mean of its divisors is an integer number (13534080).

Almost surely, 2^253145431 is an apocalyptic number.

253145431 is a deficient number, since it is larger than the sum of its proper divisors (71672489).

253145431 is a wasteful number, since it uses less digits than its factorization.

253145431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6435 (or 6424 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 253145431 is about 15910.5446481257. The cubic root of 253145431 is about 632.5915179483.

Adding to 253145431 its reverse (134541352), we get a palindrome (387686783).

The spelling of 253145431 in words is "two hundred fifty-three million, one hundred forty-five thousand, four hundred thirty-one".