113523521 has 2 divisors, whose sum is σ = 113523522. Its totient is φ = 113523520.

The previous prime is 113523517. The next prime is 113523551. The reversal of 113523521 is 125325311.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82609921 + 30913600 = 9089^2 + 5560^2 .

It is a cyclic number.

It is not a de Polignac number, because 113523521 - 2² = 113523517 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (113523551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56761760 + 56761761.

It is an arithmetic number, because the mean of its divisors is an integer number (56761761).

Almost surely, 2^113523521 is an apocalyptic number.

It is an amenable number.

113523521 is a deficient number, since it is larger than the sum of its proper divisors (1).

113523521 is an equidigital number, since it uses as much as digits as its factorization.

113523521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 23.

The square root of 113523521 is about 10654.7417143730. The cubic root of 113523521 is about 484.2042728231.

Adding to 113523521 its reverse (125325311), we get a palindrome (238848832).

The spelling of 113523521 in words is "one hundred thirteen million, five hundred twenty-three thousand, five hundred twenty-one".