7221694512 has 80 divisors (see below), whose sum is σ = 19162344960. Its totient is φ = 2342328576.

The previous prime is 7221694507. The next prime is 7221694549. The reversal of 7221694512 is 2154961227.

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, 548713 + ... + 561719.

It is an arithmetic number, because the mean of its divisors is an integer number (239529312).

Almost surely, 2^7221694512 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 7221694512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9581172480).

7221694512 is an abundant number, since it is smaller than the sum of its proper divisors (11940650448).

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

7221694512 is a wasteful number, since it uses less digits than its factorization.

7221694512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13330 (or 13324 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 7221694512 is about 84980.5537284854. The cubic root of 7221694512 is about 1932.9162524256.

The spelling of 7221694512 in words is "seven billion, two hundred twenty-one million, six hundred ninety-four thousand, five hundred twelve".