108521513 has 4 divisors (see below), whose sum is σ = 108616788. Its totient is φ = 108426240.

The previous prime is 108521507. The next prime is 108521519. The reversal of 108521513 is 315125801.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (108521507) and next prime (108521519).

It can be written as a sum of positive squares in 2 ways, for example, as 63792169 + 44729344 = 7987^2 + 6688^2 .

It is a cyclic number.

It is not a de Polignac number, because 108521513 - 2²⁴ = 91744297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108521519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45908 + ... + 48213.

It is an arithmetic number, because the mean of its divisors is an integer number (27154197).

Almost surely, 2^108521513 is an apocalyptic number.

It is an amenable number.

108521513 is a deficient number, since it is larger than the sum of its proper divisors (95275).

108521513 is an equidigital number, since it uses as much as digits as its factorization.

108521513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95274.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 108521513 is about 10417.3659338626. The cubic root of 108521513 is about 476.9856131216.

The spelling of 108521513 in words is "one hundred eight million, five hundred twenty-one thousand, five hundred thirteen".