16117513 has 4 divisors (see below), whose sum is σ = 17065620. Its totient is φ = 15169408.

The previous prime is 16117511. The next prime is 16117531. The reversal of 16117513 is 31571161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31571161 = 571 ⋅55291.

It can be written as a sum of positive squares in 2 ways, for example, as 4338889 + 11778624 = 2083^2 + 3432^2 .

It is a cyclic number.

It is not a de Polignac number, because 16117513 - 2¹ = 16117511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16117511) 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, 474028 + ... + 474061.

It is an arithmetic number, because the mean of its divisors is an integer number (4266405).

Almost surely, 2^16117513 is an apocalyptic number.

It is an amenable number.

16117513 is a deficient number, since it is larger than the sum of its proper divisors (948107).

16117513 is an equidigital number, since it uses as much as digits as its factorization.

16117513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948106.

The product of its digits is 630, while the sum is 25.

The square root of 16117513 is about 4014.6622522947. The cubic root of 16117513 is about 252.5996104064.

Adding to 16117513 its reverse (31571161), we get a palindrome (47688674).

The spelling of 16117513 in words is "sixteen million, one hundred seventeen thousand, five hundred thirteen".