111402631 has 2 divisors, whose sum is σ = 111402632. Its totient is φ = 111402630.

The previous prime is 111402587. The next prime is 111402677. The reversal of 111402631 is 136204111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111402631 - 2⁷ = 111402503 is a prime.

It is a super-2 number, since 2×111402631² = 24821092387444322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 111402599 and 111402608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111402691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55701315 + 55701316.

It is an arithmetic number, because the mean of its divisors is an integer number (55701316).

Almost surely, 2^111402631 is an apocalyptic number.

111402631 is a deficient number, since it is larger than the sum of its proper divisors (1).

111402631 is an equidigital number, since it uses as much as digits as its factorization.

111402631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 111402631 is about 10554.7444781956. The cubic root of 111402631 is about 481.1699340349.

Adding to 111402631 its reverse (136204111), we get a palindrome (247606742).

The spelling of 111402631 in words is "one hundred eleven million, four hundred two thousand, six hundred thirty-one".