111427931 has 4 divisors (see below), whose sum is σ = 113316600. Its totient is φ = 109539264.

The previous prime is 111427891. The next prime is 111427933. The reversal of 111427931 is 139724111.

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 111427931 - 2²² = 107233627 is a prime.

It is a super-2 number, since 2×111427931² = 24832367613881522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111427894 and 111427903.

It is not an unprimeable number, because it can be changed into a prime (111427933) 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, 944246 + ... + 944363.

It is an arithmetic number, because the mean of its divisors is an integer number (28329150).

Almost surely, 2^111427931 is an apocalyptic number.

111427931 is a deficient number, since it is larger than the sum of its proper divisors (1888669).

111427931 is an equidigital number, since it uses as much as digits as its factorization.

111427931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888668.

The product of its digits is 1512, while the sum is 29.

The square root of 111427931 is about 10555.9429233015. The cubic root of 111427931 is about 481.2063565077.

The spelling of 111427931 in words is "one hundred eleven million, four hundred twenty-seven thousand, nine hundred thirty-one".