7228642252721 has 8 divisors (see below), whose sum is σ = 7429127496384. Its totient is φ = 7028426300400.

The previous prime is 7228642252687. The next prime is 7228642252723. The reversal of 7228642252721 is 1272522468227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7228642252721 - 2¹⁴ = 7228642236337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7228642252721.

It is not an unprimeable number, because it can be changed into a prime (7228642252723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67268405 + ... + 67375778.

It is an arithmetic number, because the mean of its divisors is an integer number (928640937048).

Almost surely, 2^{7228642252721} is an apocalyptic number.

It is an amenable number.

7228642252721 is a deficient number, since it is larger than the sum of its proper divisors (200485243663).

7228642252721 is a wasteful number, since it uses less digits than its factorization.

7228642252721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134645671.

The product of its digits is 3010560, while the sum is 50.

The spelling of 7228642252721 in words is "seven trillion, two hundred twenty-eight billion, six hundred forty-two million, two hundred fifty-two thousand, seven hundred twenty-one".