82815218 has 8 divisors (see below), whose sum is σ = 125384112. Its totient is φ = 41020516.

The previous prime is 82815209. The next prime is 82815221. The reversal of 82815218 is 81251828.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193280 + ... + 193707.

It is an arithmetic number, because the mean of its divisors is an integer number (15673014).

Almost surely, 2^82815218 is an apocalyptic number.

82815218 is a deficient number, since it is larger than the sum of its proper divisors (42568894).

82815218 is a wasteful number, since it uses less digits than its factorization.

82815218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387096.

The product of its digits is 10240, while the sum is 35.

The square root of 82815218 is about 9100.2866987804. The cubic root of 82815218 is about 435.8831189377.

The spelling of 82815218 in words is "eighty-two million, eight hundred fifteen thousand, two hundred eighteen".