7221940325 has 36 divisors (see below), whose sum is σ = 9451106028. Its totient is φ = 5472230400.

The previous prime is 7221940309. The next prime is 7221940331. The reversal of 7221940325 is 5230491227.

It is a happy number.

It is a Cunningham number, because it is equal to 84982²+1.

It can be written as a sum of positive squares in 18 ways, for example, as 1707838276 + 5514102049 = 41326^2 + 74257^2 .

It is not a de Polignac number, because 7221940325 - 2⁴ = 7221940309 is a prime.

It is a super-2 number, since 2×7221940325² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1111085 + ... + 1117565.

It is an arithmetic number, because the mean of its divisors is an integer number (262530723).

Almost surely, 2^7221940325 is an apocalyptic number.

It is an amenable number.

7221940325 is a deficient number, since it is larger than the sum of its proper divisors (2229165703).

7221940325 is a wasteful number, since it uses less digits than its factorization.

7221940325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6602 (or 6568 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 7221940325 is about 84982.0000058836. Note that the first 5 decimals coincide. The cubic root of 7221940325 is about 1932.9381831304.

The spelling of 7221940325 in words is "seven billion, two hundred twenty-one million, nine hundred forty thousand, three hundred twenty-five".