111400431 has 16 divisors (see below), whose sum is σ = 157311744. Its totient is φ = 69974784.

The previous prime is 111400427. The next prime is 111400433. The reversal of 111400431 is 134004111.

It is not a de Polignac number, because 111400431 - 2² = 111400427 is a prime.

It is a super-2 number, since 2×111400431² = 24820112053971522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111400431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111400433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7426 + ... + 16671.

It is an arithmetic number, because the mean of its divisors is an integer number (9831984).

Almost surely, 2^111400431 is an apocalyptic number.

111400431 is a deficient number, since it is larger than the sum of its proper divisors (45911313).

111400431 is a wasteful number, since it uses less digits than its factorization.

111400431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24190.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 111400431 is about 10554.6402591467. The cubic root of 111400431 is about 481.1667666028.

Adding to 111400431 its reverse (134004111), we get a palindrome (245404542).

The spelling of 111400431 in words is "one hundred eleven million, four hundred thousand, four hundred thirty-one".