7287223362721 has 4 divisors (see below), whose sum is σ = 7289559763200. Its totient is φ = 7284886962244.

The previous prime is 7287223362677. The next prime is 7287223362773. The reversal of 7287223362721 is 1272633227827.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7287223362721 - 2⁷ = 7287223362593 is a prime.

It is a super-4 number, since 4×7287223362721⁴ (a number of 53 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7287223362791) 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, 1168195561 + ... + 1168201798.

It is an arithmetic number, because the mean of its divisors is an integer number (1822389940800).

Almost surely, 2^{7287223362721} is an apocalyptic number.

It is an amenable number.

7287223362721 is a deficient number, since it is larger than the sum of its proper divisors (2336400479).

7287223362721 is a wasteful number, since it uses less digits than its factorization.

7287223362721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336400478.

The product of its digits is 4741632, while the sum is 52.

The spelling of 7287223362721 in words is "seven trillion, two hundred eighty-seven billion, two hundred twenty-three million, three hundred sixty-two thousand, seven hundred twenty-one".