111662431 has 2 divisors, whose sum is σ = 111662432. Its totient is φ = 111662430.

The previous prime is 111662429. The next prime is 111662483. The reversal of 111662431 is 134266111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111662431 - 2¹ = 111662429 is a prime.

It is a super-2 number, since 2×111662431² = 24936996993659522, which contains 22 as substring.

Together with 111662429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 111662396 and 111662405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111662491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55831215 + 55831216.

It is an arithmetic number, because the mean of its divisors is an integer number (55831216).

Almost surely, 2^111662431 is an apocalyptic number.

111662431 is a deficient number, since it is larger than the sum of its proper divisors (1).

111662431 is an equidigital number, since it uses as much as digits as its factorization.

111662431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 111662431 is about 10567.0445726324. The cubic root of 111662431 is about 481.5436861244.

The spelling of 111662431 in words is "one hundred eleven million, six hundred sixty-two thousand, four hundred thirty-one".