11231015431 has 4 divisors (see below), whose sum is σ = 11231261200. Its totient is φ = 11230769664.

The previous prime is 11231015417. The next prime is 11231015443. The reversal of 11231015431 is 13451013211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13451013211 = 58109 ⋅231479.

It is a cyclic number.

It is not a de Polignac number, because 11231015431 - 2⁵ = 11231015399 is a prime.

It is a super-2 number, since 2×11231015431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231015531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31866 + ... + 153223.

It is an arithmetic number, because the mean of its divisors is an integer number (2807815300).

Almost surely, 2^11231015431 is an apocalyptic number.

11231015431 is a deficient number, since it is larger than the sum of its proper divisors (245769).

11231015431 is an equidigital number, since it uses as much as digits as its factorization.

11231015431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245768.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 11231015431 its reverse (13451013211), we get a palindrome (24682028642).

The spelling of 11231015431 in words is "eleven billion, two hundred thirty-one million, fifteen thousand, four hundred thirty-one".