39224621 has 4 divisors (see below), whose sum is σ = 39253500. Its totient is φ = 39195744.

The previous prime is 39224597. The next prime is 39224623. The reversal of 39224621 is 12642293.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14523721 + 24700900 = 3811^2 + 4970^2 .

It is a cyclic number.

It is not a de Polignac number, because 39224621 - 2¹⁸ = 38962477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39224623) 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, 12296 + ... + 15153.

It is an arithmetic number, because the mean of its divisors is an integer number (9813375).

Almost surely, 2^39224621 is an apocalyptic number.

It is an amenable number.

39224621 is a deficient number, since it is larger than the sum of its proper divisors (28879).

39224621 is a wasteful number, since it uses less digits than its factorization.

39224621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28878.

The product of its digits is 5184, while the sum is 29.

The square root of 39224621 is about 6262.9562508451. The cubic root of 39224621 is about 339.7709558869.

The spelling of 39224621 in words is "thirty-nine million, two hundred twenty-four thousand, six hundred twenty-one".