253231340231 has 4 divisors (see below), whose sum is σ = 253674828264. Its totient is φ = 252787852200.

The previous prime is 253231340221. The next prime is 253231340239. The reversal of 253231340231 is 132043132352.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253231340231 is a prime.

It is a super-2 number, since 2×253231340231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253231340194 and 253231340203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253231340239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221743160 + ... + 221744301.

It is an arithmetic number, because the mean of its divisors is an integer number (63418707066).

Almost surely, 2^253231340231 is an apocalyptic number.

253231340231 is a deficient number, since it is larger than the sum of its proper divisors (443488033).

253231340231 is an equidigital number, since it uses as much as digits as its factorization.

253231340231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443488032.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 253231340231 its reverse (132043132352), we get a palindrome (385274472583).

The spelling of 253231340231 in words is "two hundred fifty-three billion, two hundred thirty-one million, three hundred forty thousand, two hundred thirty-one".