111423131 has 4 divisors (see below), whose sum is σ = 111448872. Its totient is φ = 111397392.

The previous prime is 111423127. The next prime is 111423139. The reversal of 111423131 is 131324111.

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 111423131 - 2² = 111423127 is a prime.

It is a super-2 number, since 2×111423131² = 24830228243686322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111423139) 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, 4610 + ... + 15623.

It is an arithmetic number, because the mean of its divisors is an integer number (27862218).

Almost surely, 2^111423131 is an apocalyptic number.

111423131 is a deficient number, since it is larger than the sum of its proper divisors (25741).

111423131 is an equidigital number, since it uses as much as digits as its factorization.

111423131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25740.

The product of its digits is 72, while the sum is 17.

The square root of 111423131 is about 10555.7155607756. The cubic root of 111423131 is about 481.1994467390.

Adding to 111423131 its reverse (131324111), we get a palindrome (242747242).

The spelling of 111423131 in words is "one hundred eleven million, four hundred twenty-three thousand, one hundred thirty-one".