16523313 has 4 divisors (see below), whose sum is σ = 22031088. Its totient is φ = 11015540.

The previous prime is 16523291. The next prime is 16523317. The reversal of 16523313 is 31332561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16523313 - 2⁶ = 16523249 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16523317) 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, 2753883 + ... + 2753888.

It is an arithmetic number, because the mean of its divisors is an integer number (5507772).

Almost surely, 2^16523313 is an apocalyptic number.

It is an amenable number.

16523313 is a deficient number, since it is larger than the sum of its proper divisors (5507775).

16523313 is an equidigital number, since it uses as much as digits as its factorization.

16523313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5507774.

The product of its digits is 1620, while the sum is 24.

The square root of 16523313 is about 4064.8878213304. The cubic root of 16523313 is about 254.7020125445.

Adding to 16523313 its reverse (31332561), we get a palindrome (47855874).

It can be divided in two parts, 16523 and 313, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 16523313 in words is "sixteen million, five hundred twenty-three thousand, three hundred thirteen".