34221621 has 8 divisors (see below), whose sum is σ = 52147264. Its totient is φ = 19555200.

The previous prime is 34221619. The next prime is 34221637. The reversal of 34221621 is 12612243.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 34221621 - 2¹ = 34221619 is a prime.

It is a super-2 number, since 2×34221621² = 2342238687735282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1629601 = 34221621 / (3 + 4 + 2 + 2 + 1 + 6 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34221601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 814780 + ... + 814821.

It is an arithmetic number, because the mean of its divisors is an integer number (6518408).

Almost surely, 2^34221621 is an apocalyptic number.

It is an amenable number.

34221621 is a deficient number, since it is larger than the sum of its proper divisors (17925643).

34221621 is a wasteful number, since it uses less digits than its factorization.

34221621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629611.

The product of its digits is 576, while the sum is 21.

The square root of 34221621 is about 5849.9248713125. The cubic root of 34221621 is about 324.6635445076.

Adding to 34221621 its reverse (12612243), we get a palindrome (46833864).

The spelling of 34221621 in words is "thirty-four million, two hundred twenty-one thousand, six hundred twenty-one".