7221868715 has 4 divisors (see below), whose sum is σ = 8666242464. Its totient is φ = 5777494968.

The previous prime is 7221868711. The next prime is 7221868727. The reversal of 7221868715 is 5178681227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5178681227 = 1129 ⋅4586963.

It is a cyclic number.

It is not a de Polignac number, because 7221868715 - 2² = 7221868711 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 7221868715.

It is not an unprimeable number, because it can be changed into a prime (7221868711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722186867 + ... + 722186876.

It is an arithmetic number, because the mean of its divisors is an integer number (2166560616).

Almost surely, 2^7221868715 is an apocalyptic number.

7221868715 is a deficient number, since it is larger than the sum of its proper divisors (1444373749).

7221868715 is a wasteful number, since it uses less digits than its factorization.

7221868715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444373748.

The product of its digits is 376320, while the sum is 47.

The square root of 7221868715 is about 84981.5786803234. The cubic root of 7221868715 is about 1932.9317943506.

The spelling of 7221868715 in words is "seven billion, two hundred twenty-one million, eight hundred sixty-eight thousand, seven hundred fifteen".