7212640222015 has 4 divisors (see below), whose sum is σ = 8655168266424. Its totient is φ = 5770112177608.

The previous prime is 7212640222001. The next prime is 7212640222091. The reversal of 7212640222015 is 5102220462127.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7212640222015 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 721264022197 + ... + 721264022206.

It is an arithmetic number, because the mean of its divisors is an integer number (2163792066606).

Almost surely, 2^{7212640222015} is an apocalyptic number.

7212640222015 is a deficient number, since it is larger than the sum of its proper divisors (1442528044409).

7212640222015 is a wasteful number, since it uses less digits than its factorization.

7212640222015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442528044408.

The product of its (nonzero) digits is 26880, while the sum is 34.

The spelling of 7212640222015 in words is "seven trillion, two hundred twelve billion, six hundred forty million, two hundred twenty-two thousand, fifteen".