253111244431 has 4 divisors (see below), whose sum is σ = 253181420272. Its totient is φ = 253041068592.

The previous prime is 253111244429. The next prime is 253111244459. The reversal of 253111244431 is 134442111352.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 253111244431 - 2¹ = 253111244429 is a prime.

It is a super-2 number, since 2×253111244431² (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 = 253111244393 and 253111244402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253111244471) 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, 35082510 + ... + 35089723.

It is an arithmetic number, because the mean of its divisors is an integer number (63295355068).

Almost surely, 2^253111244431 is an apocalyptic number.

253111244431 is a deficient number, since it is larger than the sum of its proper divisors (70175841).

253111244431 is an equidigital number, since it uses as much as digits as its factorization.

253111244431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70175840.

The product of its digits is 11520, while the sum is 31.

Adding to 253111244431 its reverse (134442111352), we get a palindrome (387553355783).

The spelling of 253111244431 in words is "two hundred fifty-three billion, one hundred eleven million, two hundred forty-four thousand, four hundred thirty-one".