7332021621 has 6 divisors (see below), whose sum is σ = 10590697910. Its totient is φ = 4888014408.

The previous prime is 7332021617. The next prime is 7332021629. The reversal of 7332021621 is 1261202337.

7332021621 is a `hidden beast` number, since 7 + 3 + 32 + 0 + 2 + 1 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6986619396 + 345402225 = 83586^2 + 18585^2 .

It is not a de Polignac number, because 7332021621 - 2² = 7332021617 is a prime.

It is a super-2 number, since 2×7332021621² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7332021629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 407334526 + ... + 407334543.

Almost surely, 2^7332021621 is an apocalyptic number.

It is an amenable number.

7332021621 is a deficient number, since it is larger than the sum of its proper divisors (3258676289).

7332021621 is a wasteful number, since it uses less digits than its factorization.

7332021621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814669075 (or 814669072 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 7332021621 is about 85627.2247652579. The cubic root of 7332021621 is about 1942.7097165288.

Adding to 7332021621 its reverse (1261202337), we get a palindrome (8593223958).

The spelling of 7332021621 in words is "seven billion, three hundred thirty-two million, twenty-one thousand, six hundred twenty-one".