11255431231 has 8 divisors (see below), whose sum is σ = 12510325584. Its totient is φ = 10039149120.

The previous prime is 11255431219. The next prime is 11255431241. The reversal of 11255431231 is 13213455211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-11255431231 is a prime.

It is a super-2 number, since 2×11255431231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11255431231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11255431241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9652446 + ... + 9653611.

It is an arithmetic number, because the mean of its divisors is an integer number (1563790698).

Almost surely, 2^11255431231 is an apocalyptic number.

11255431231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11255431231 is a deficient number, since it is larger than the sum of its proper divisors (1254894353).

11255431231 is a wasteful number, since it uses less digits than its factorization.

11255431231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19306121.

The product of its digits is 3600, while the sum is 28.

Adding to 11255431231 its reverse (13213455211), we get a palindrome (24468886442).

The spelling of 11255431231 in words is "eleven billion, two hundred fifty-five million, four hundred thirty-one thousand, two hundred thirty-one".