111641331 has 4 divisors (see below), whose sum is σ = 148855112. Its totient is φ = 74427552.

The previous prime is 111641317. The next prime is 111641347. The reversal of 111641331 is 133146111.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 111641331 - 2¹⁹ = 111117043 is a prime.

It is a super-2 number, since 2×111641331² = 24927573574903122, 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 = 111641298 and 111641307.

It is not an unprimeable number, because it can be changed into a prime (111641311) 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, 18606886 + ... + 18606891.

It is an arithmetic number, because the mean of its divisors is an integer number (37213778).

Almost surely, 2^111641331 is an apocalyptic number.

111641331 is a deficient number, since it is larger than the sum of its proper divisors (37213781).

111641331 is an equidigital number, since it uses as much as digits as its factorization.

111641331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37213780.

The product of its digits is 216, while the sum is 21.

The square root of 111641331 is about 10566.0461384569. The cubic root of 111641331 is about 481.5133529982.

Adding to 111641331 its reverse (133146111), we get a palindrome (244787442).

The spelling of 111641331 in words is "one hundred eleven million, six hundred forty-one thousand, three hundred thirty-one".