39224981 has 2 divisors, whose sum is σ = 39224982. Its totient is φ = 39224980.

The previous prime is 39224963. The next prime is 39224989. The reversal of 39224981 is 18942293.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21298225 + 17926756 = 4615^2 + 4234^2 .

It is an emirp because it is prime and its reverse (18942293) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39224981 - 2¹⁰ = 39223957 is a prime.

It is a super-2 number, since 2×39224981² = 3077198268900722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39224989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19612490 + 19612491.

It is an arithmetic number, because the mean of its divisors is an integer number (19612491).

Almost surely, 2^39224981 is an apocalyptic number.

It is an amenable number.

39224981 is a deficient number, since it is larger than the sum of its proper divisors (1).

39224981 is an equidigital number, since it uses as much as digits as its factorization.

39224981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 39224981 is about 6262.9849912003. The cubic root of 39224981 is about 339.7719953460.

The spelling of 39224981 in words is "thirty-nine million, two hundred twenty-four thousand, nine hundred eighty-one".