7057447221 has 32 divisors (see below), whose sum is σ = 10683187200. Its totient is φ = 4104927680.

The previous prime is 7057447183. The next prime is 7057447223. The reversal of 7057447221 is 1227447507.

It is a cyclic number.

It is not a de Polignac number, because 7057447221 - 2⁶ = 7057447157 is a prime.

It is a super-2 number, since 2×7057447221² = 99615122554401245682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7057447221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7057447223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137740 + ... + 181898.

It is an arithmetic number, because the mean of its divisors is an integer number (333849600).

Almost surely, 2^7057447221 is an apocalyptic number.

It is an amenable number.

7057447221 is a deficient number, since it is larger than the sum of its proper divisors (3625739979).

7057447221 is a wasteful number, since it uses less digits than its factorization.

7057447221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44369.

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

The square root of 7057447221 is about 84008.6139690449. The cubic root of 7057447221 is about 1918.1499124590.

The spelling of 7057447221 in words is "seven billion, fifty-seven million, four hundred forty-seven thousand, two hundred twenty-one".