7221563376 has 80 divisors (see below), whose sum is σ = 18959453184. Its totient is φ = 2368092672.

The previous prime is 7221563359. The next prime is 7221563407. The reversal of 7221563376 is 6733651227.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4607745 + ... + 4609311.

Almost surely, 2^7221563376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7221563376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9479726592).

7221563376 is an abundant number, since it is smaller than the sum of its proper divisors (11737889808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7221563376 is a wasteful number, since it uses less digits than its factorization.

7221563376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078 (or 3072 counting only the distinct ones).

The product of its digits is 317520, while the sum is 42.

The square root of 7221563376 is about 84979.7821602291. The cubic root of 7221563376 is about 1932.9045526581.

The spelling of 7221563376 in words is "seven billion, two hundred twenty-one million, five hundred sixty-three thousand, three hundred seventy-six".