111541431 has 8 divisors (see below), whose sum is σ = 149544304. Its totient is φ = 73949760.

The previous prime is 111541351. The next prime is 111541439. The reversal of 111541431 is 134145111.

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

It is not a de Polignac number, because 111541431 - 2¹¹ = 111539383 is a prime.

It is a super-2 number, since 2×111541431² = 24882981659055522, 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 = 111541398 and 111541407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111541439) 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, 102166 + ... + 103251.

It is an arithmetic number, because the mean of its divisors is an integer number (18693038).

Almost surely, 2^111541431 is an apocalyptic number.

111541431 is a deficient number, since it is larger than the sum of its proper divisors (38002873).

111541431 is a wasteful number, since it uses less digits than its factorization.

111541431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205601.

The product of its digits is 240, while the sum is 21.

The square root of 111541431 is about 10561.3176734724. The cubic root of 111541431 is about 481.3696859568.

Adding to 111541431 its reverse (134145111), we get a palindrome (245686542).

The spelling of 111541431 in words is "one hundred eleven million, five hundred forty-one thousand, four hundred thirty-one".