715278217 has 4 divisors (see below), whose sum is σ = 715335940. Its totient is φ = 715220496.

The previous prime is 715278203. The next prime is 715278241. The reversal of 715278217 is 712872517.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 712872517 = 7 ⋅101838931.

It can be written as a sum of positive squares in 2 ways, for example, as 658486921 + 56791296 = 25661^2 + 7536^2 .

It is a cyclic number.

It is not a de Polignac number, because 715278217 - 2¹¹ = 715276169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 715278217.

It is not an unprimeable number, because it can be changed into a prime (715278517) 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, 1842 + ... + 37867.

It is an arithmetic number, because the mean of its divisors is an integer number (178833985).

Almost surely, 2^715278217 is an apocalyptic number.

It is an amenable number.

715278217 is a deficient number, since it is larger than the sum of its proper divisors (57723).

715278217 is a wasteful number, since it uses less digits than its factorization.

715278217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57722.

The product of its digits is 54880, while the sum is 40.

The square root of 715278217 is about 26744.6857711957. The cubic root of 715278217 is about 894.3173709332.

The spelling of 715278217 in words is "seven hundred fifteen million, two hundred seventy-eight thousand, two hundred seventeen".