7221252747 has 16 divisors (see below), whose sum is σ = 9943424000. Its totient is φ = 4656765600.

The previous prime is 7221252743. The next prime is 7221252749. The reversal of 7221252747 is 7472521227.

It is not a de Polignac number, because 7221252747 - 2² = 7221252743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7221252743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204129 + ... + 236877.

It is an arithmetic number, because the mean of its divisors is an integer number (621464000).

Almost surely, 2^7221252747 is an apocalyptic number.

7221252747 is a deficient number, since it is larger than the sum of its proper divisors (2722171253).

7221252747 is a wasteful number, since it uses less digits than its factorization.

7221252747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35154.

The product of its digits is 109760, while the sum is 39.

The square root of 7221252747 is about 84977.9544764405. The cubic root of 7221252747 is about 1932.8768382152.

The spelling of 7221252747 in words is "seven billion, two hundred twenty-one million, two hundred fifty-two thousand, seven hundred forty-seven".