113135531 has 2 divisors, whose sum is σ = 113135532. Its totient is φ = 113135530.

The previous prime is 113135521. The next prime is 113135567. The reversal of 113135531 is 135531311.

It is a weak prime.

It is an emirp because it is prime and its reverse (135531311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113135531 is a prime.

It is a super-2 number, since 2×113135531² = 25599296749303922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 113135497 and 113135506.

It is not a weakly prime, because it can be changed into another prime (113135521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56567765 + 56567766.

It is an arithmetic number, because the mean of its divisors is an integer number (56567766).

Almost surely, 2^113135531 is an apocalyptic number.

113135531 is a deficient number, since it is larger than the sum of its proper divisors (1).

113135531 is an equidigital number, since it uses as much as digits as its factorization.

113135531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 675, while the sum is 23.

The square root of 113135531 is about 10636.5187444013. The cubic root of 113135531 is about 483.6520206099.

Adding to 113135531 its reverse (135531311), we get a palindrome (248666842).

The spelling of 113135531 in words is "one hundred thirteen million, one hundred thirty-five thousand, five hundred thirty-one".