11423013231 has 48 divisors (see below), whose sum is σ = 18069682176. Its totient is φ = 6398913024.

The previous prime is 11423013211. The next prime is 11423013271. The reversal of 11423013231 is 13231032411.

It is not a de Polignac number, because 11423013231 - 2²⁵ = 11389458799 is a prime.

It is a super-2 number, since 2×11423013231² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 11423013198 and 11423013207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11423013211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1521970 + ... + 1529456.

It is an arithmetic number, because the mean of its divisors is an integer number (376451712).

Almost surely, 2^11423013231 is an apocalyptic number.

11423013231 is a deficient number, since it is larger than the sum of its proper divisors (6646668945).

11423013231 is a wasteful number, since it uses less digits than its factorization.

11423013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7708 (or 7701 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 11423013231 its reverse (13231032411), we get a palindrome (24654045642).

The spelling of 11423013231 in words is "eleven billion, four hundred twenty-three million, thirteen thousand, two hundred thirty-one".