113522509 has 2 divisors, whose sum is σ = 113522510. Its totient is φ = 113522508.

The previous prime is 113522489. The next prime is 113522533. The reversal of 113522509 is 905225311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113486409 + 36100 = 10653^2 + 190^2 .

It is a cyclic number.

It is not a de Polignac number, because 113522509 - 2⁵ = 113522477 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113522599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56761254 + 56761255.

It is an arithmetic number, because the mean of its divisors is an integer number (56761255).

Almost surely, 2^113522509 is an apocalyptic number.

It is an amenable number.

113522509 is a deficient number, since it is larger than the sum of its proper divisors (1).

113522509 is an equidigital number, since it uses as much as digits as its factorization.

113522509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 113522509 is about 10654.6942236744. The cubic root of 113522509 is about 484.2028340135.

It can be divided in two parts, 11352 and 2509, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 113522509 in words is "one hundred thirteen million, five hundred twenty-two thousand, five hundred nine".