7221507864287 has 4 divisors (see below), whose sum is σ = 7312919356320. Its totient is φ = 7130096372256.

The previous prime is 7221507864247. The next prime is 7221507864299. The reversal of 7221507864287 is 7824687051227.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 7221507864287 - 2¹⁰ = 7221507863263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221507864227) 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, 45705745898 + ... + 45705746055.

It is an arithmetic number, because the mean of its divisors is an integer number (1828229839080).

Almost surely, 2^{7221507864287} is an apocalyptic number.

7221507864287 is a deficient number, since it is larger than the sum of its proper divisors (91411492033).

7221507864287 is an equidigital number, since it uses as much as digits as its factorization.

7221507864287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91411492032.

The product of its (nonzero) digits is 21073920, while the sum is 59.

The spelling of 7221507864287 in words is "seven trillion, two hundred twenty-one billion, five hundred seven million, eight hundred sixty-four thousand, two hundred eighty-seven".