111144431 has 8 divisors (see below), whose sum is σ = 113080320. Its totient is φ = 109225368.

The previous prime is 111144413. The next prime is 111144457. The reversal of 111144431 is 134441111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111144431 - 2⁶ = 111144367 is a prime.

It is a super-2 number, since 2×111144431² = 24706169084627522, 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 (111140431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9500 + ... + 17678.

It is an arithmetic number, because the mean of its divisors is an integer number (14135040).

Almost surely, 2^111144431 is an apocalyptic number.

111144431 is a deficient number, since it is larger than the sum of its proper divisors (1935889).

111144431 is a wasteful number, since it uses less digits than its factorization.

111144431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8413.

The product of its digits is 192, while the sum is 20.

The square root of 111144431 is about 10542.5059165267. The cubic root of 111144431 is about 480.7979075617.

Adding to 111144431 its reverse (134441111), we get a palindrome (245585542).

The spelling of 111144431 in words is "one hundred eleven million, one hundred forty-four thousand, four hundred thirty-one".