111520231 has 2 divisors, whose sum is σ = 111520232. Its totient is φ = 111520230.

The previous prime is 111520219. The next prime is 111520243. The reversal of 111520231 is 132025111.

It is a balanced prime because it is at equal distance from previous prime (111520219) and next prime (111520243).

It is a cyclic number.

It is not a de Polignac number, because 111520231 - 2⁷ = 111520103 is a prime.

It is a super-2 number, since 2×111520231² = 24873523844586722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111520831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55760115 + 55760116.

It is an arithmetic number, because the mean of its divisors is an integer number (55760116).

Almost surely, 2^111520231 is an apocalyptic number.

111520231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111520231 is an equidigital number, since it uses as much as digits as its factorization.

111520231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 111520231 is about 10560.3139631358. The cubic root of 111520231 is about 481.3391870237.

Adding to 111520231 its reverse (132025111), we get a palindrome (243545342).

The spelling of 111520231 in words is "one hundred eleven million, five hundred twenty thousand, two hundred thirty-one".