111607231 has 4 divisors (see below), whose sum is σ = 114202792. Its totient is φ = 109011672.

The previous prime is 111607229. The next prime is 111607253. The reversal of 111607231 is 132706111.

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 111607231 - 2¹ = 111607229 is a prime.

It is a super-2 number, since 2×111607231² = 24912348022974722, which 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 (111607211) 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, 1297716 + ... + 1297801.

It is an arithmetic number, because the mean of its divisors is an integer number (28550698).

Almost surely, 2^111607231 is an apocalyptic number.

111607231 is a deficient number, since it is larger than the sum of its proper divisors (2595561).

111607231 is an equidigital number, since it uses as much as digits as its factorization.

111607231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595560.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 111607231 is about 10564.4323557870. The cubic root of 111607231 is about 481.4643231356.

The spelling of 111607231 in words is "one hundred eleven million, six hundred seven thousand, two hundred thirty-one".