7372216221 has 4 divisors (see below), whose sum is σ = 9829621632. Its totient is φ = 4914810812.

The previous prime is 7372216193. The next prime is 7372216231. The reversal of 7372216221 is 1226122737.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7372216221 - 2⁶ = 7372216157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7372216231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1228702701 + ... + 1228702706.

It is an arithmetic number, because the mean of its divisors is an integer number (2457405408).

Almost surely, 2^7372216221 is an apocalyptic number.

It is an amenable number.

7372216221 is a deficient number, since it is larger than the sum of its proper divisors (2457405411).

7372216221 is a wasteful number, since it uses less digits than its factorization.

7372216221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457405410.

The product of its digits is 14112, while the sum is 33.

The square root of 7372216221 is about 85861.6108688860. The cubic root of 7372216221 is about 1946.2532676993.

Adding to 7372216221 its reverse (1226122737), we get a palindrome (8598338958).

The spelling of 7372216221 in words is "seven billion, three hundred seventy-two million, two hundred sixteen thousand, two hundred twenty-one".