113131665 has 12 divisors (see below), whose sum is σ = 196094964. Its totient is φ = 60336864.

The previous prime is 113131633. The next prime is 113131673. The reversal of 113131665 is 566131311.

It can be written as a sum of positive squares in 2 ways, for example, as 58844241 + 54287424 = 7671^2 + 7368^2 .

It is not a de Polignac number, because 113131665 - 2⁵ = 113131633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1256974 + ... + 1257063.

It is an arithmetic number, because the mean of its divisors is an integer number (16341247).

Almost surely, 2^113131665 is an apocalyptic number.

113131665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

113131665 is a deficient number, since it is larger than the sum of its proper divisors (82963299).

113131665 is a wasteful number, since it uses less digits than its factorization.

113131665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514048 (or 2514045 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 113131665 is about 10636.3370104562. The cubic root of 113131665 is about 483.6465115242.

Adding to 113131665 its reverse (566131311), we get a palindrome (679262976).

The spelling of 113131665 in words is "one hundred thirteen million, one hundred thirty-one thousand, six hundred sixty-five".