7215204345 has 24 divisors (see below), whose sum is σ = 12263358144. Its totient is φ = 3621747456.

The previous prime is 7215204319. The next prime is 7215204377. The reversal of 7215204345 is 5434025127.

7215204345 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7215204345 - 2¹² = 7215200249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 827869 + ... + 836538.

It is an arithmetic number, because the mean of its divisors is an integer number (510973256).

Almost surely, 2^7215204345 is an apocalyptic number.

It is an amenable number.

7215204345 is a deficient number, since it is larger than the sum of its proper divisors (5048153799).

7215204345 is a wasteful number, since it uses less digits than its factorization.

7215204345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664449 (or 1664432 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 7215204345 is about 84942.3589559414. The cubic root of 7215204345 is about 1932.3370389092.

The spelling of 7215204345 in words is "seven billion, two hundred fifteen million, two hundred four thousand, three hundred forty-five".