111455431 has 2 divisors, whose sum is σ = 111455432. Its totient is φ = 111455430.

The previous prime is 111455341. The next prime is 111455437. The reversal of 111455431 is 134554111.

Together with previous prime (111455341) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111455431 - 2²¹ = 109358279 is a prime.

It is a super-2 number, since 2×111455431² = 24844626198791522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111455396 and 111455405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111455437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55727715 + 55727716.

It is an arithmetic number, because the mean of its divisors is an integer number (55727716).

Almost surely, 2^111455431 is an apocalyptic number.

111455431 is a deficient number, since it is larger than the sum of its proper divisors (1).

111455431 is an equidigital number, since it uses as much as digits as its factorization.

111455431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 25.

The square root of 111455431 is about 10557.2454267200. The cubic root of 111455431 is about 481.2459398994.

The spelling of 111455431 in words is "one hundred eleven million, four hundred fifty-five thousand, four hundred thirty-one".