37224221 has 4 divisors (see below), whose sum is σ = 37855200. Its totient is φ = 36593244.

The previous prime is 37224193. The next prime is 37224251. The reversal of 37224221 is 12242273.

It is a happy number.

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 37224221 - 2¹⁸ = 36962077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37224251) 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, 315401 + ... + 315518.

It is an arithmetic number, because the mean of its divisors is an integer number (9463800).

Almost surely, 2^37224221 is an apocalyptic number.

It is an amenable number.

37224221 is a deficient number, since it is larger than the sum of its proper divisors (630979).

37224221 is an equidigital number, since it uses as much as digits as its factorization.

37224221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630978.

The product of its digits is 1344, while the sum is 23.

The square root of 37224221 is about 6101.1655443858. The cubic root of 37224221 is about 333.8939418479.

Adding to 37224221 its reverse (12242273), we get a palindrome (49466494).

The spelling of 37224221 in words is "thirty-seven million, two hundred twenty-four thousand, two hundred twenty-one".