7215716345 has 16 divisors (see below), whose sum is σ = 8983170000. Its totient is φ = 5557509888.

The previous prime is 7215716341. The next prime is 7215716371. The reversal of 7215716345 is 5436175127.

It can be written as a sum of positive squares in 8 ways, for example, as 505485289 + 6710231056 = 22483^2 + 81916^2 .

It is not a de Polignac number, because 7215716345 - 2² = 7215716341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7215716341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20690 + ... + 121899.

It is an arithmetic number, because the mean of its divisors is an integer number (561448125).

Almost surely, 2^7215716345 is an apocalyptic number.

It is an amenable number.

7215716345 is a deficient number, since it is larger than the sum of its proper divisors (1767453655).

7215716345 is a wasteful number, since it uses less digits than its factorization.

7215716345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142972.

The product of its digits is 176400, while the sum is 41.

The square root of 7215716345 is about 84945.3727109370. The cubic root of 7215716345 is about 1932.3827448525.

The spelling of 7215716345 in words is "seven billion, two hundred fifteen million, seven hundred sixteen thousand, three hundred forty-five".