84815513 has 4 divisors (see below), whose sum is σ = 88503168. Its totient is φ = 81127860.

The previous prime is 84815483. The next prime is 84815579. The reversal of 84815513 is 31551848.

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 84815513 - 2¹⁰ = 84814489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84815113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1843793 + ... + 1843838.

It is an arithmetic number, because the mean of its divisors is an integer number (22125792).

Almost surely, 2^84815513 is an apocalyptic number.

It is an amenable number.

84815513 is a deficient number, since it is larger than the sum of its proper divisors (3687655).

84815513 is a wasteful number, since it uses less digits than its factorization.

84815513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3687654.

The product of its digits is 19200, while the sum is 35.

The square root of 84815513 is about 9209.5338101339. The cubic root of 84815513 is about 439.3646356552.

It can be divided in two parts, 848 and 15513, that added together give a palindrome (16361).

The spelling of 84815513 in words is "eighty-four million, eight hundred fifteen thousand, five hundred thirteen".