7221443652 has 48 divisors (see below), whose sum is σ = 19178913600. Its totient is φ = 2348435520.

The previous prime is 7221443633. The next prime is 7221443657. The reversal of 7221443652 is 2563441227.

7221443652 is a `hidden beast` number, since 7 + 2 + 214 + 436 + 5 + 2 = 666.

It is a super-2 number, since 2×7221443652² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (7221443657) 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, 811002 + ... + 819857.

It is an arithmetic number, because the mean of its divisors is an integer number (399560700).

Almost surely, 2^7221443652 is an apocalyptic number.

It is an amenable number.

7221443652 is an abundant number, since it is smaller than the sum of its proper divisors (11957469948).

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

7221443652 is a wasteful number, since it uses less digits than its factorization.

7221443652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630913 (or 1630905 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 7221443652 is about 84979.0777309333. The cubic root of 7221443652 is about 1932.8938709294.

Adding to 7221443652 its reverse (2563441227), we get a palindrome (9784884879).

The spelling of 7221443652 in words is "seven billion, two hundred twenty-one million, four hundred forty-three thousand, six hundred fifty-two".