111319631 has 2 divisors, whose sum is σ = 111319632. Its totient is φ = 111319630.

The previous prime is 111319627. The next prime is 111319639. The reversal of 111319631 is 136913111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111319631 - 2² = 111319627 is a prime.

It is a super-2 number, since 2×111319631² = 24784120491952322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111319631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111319639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55659815 + 55659816.

It is an arithmetic number, because the mean of its divisors is an integer number (55659816).

Almost surely, 2^111319631 is an apocalyptic number.

111319631 is a deficient number, since it is larger than the sum of its proper divisors (1).

111319631 is an equidigital number, since it uses as much as digits as its factorization.

111319631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 26.

The square root of 111319631 is about 10550.8118644965. The cubic root of 111319631 is about 481.0504065558.

The spelling of 111319631 in words is "one hundred eleven million, three hundred nineteen thousand, six hundred thirty-one".