37223221 has 8 divisors (see below), whose sum is σ = 43690880. Its totient is φ = 31043088.

The previous prime is 37223213. The next prime is 37223231. The reversal of 37223221 is 12232273.

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

It is a cyclic number.

It is not a de Polignac number, because 37223221 - 2³ = 37223213 is a prime.

It is a super-2 number, since 2×37223221² = 2771136363229682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 37223192 and 37223201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37223231) 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 7 ways as a sum of consecutive naturals, for example, 71601 + ... + 72118.

It is an arithmetic number, because the mean of its divisors is an integer number (5461360).

Almost surely, 2^37223221 is an apocalyptic number.

It is an amenable number.

37223221 is a deficient number, since it is larger than the sum of its proper divisors (6467659).

37223221 is a wasteful number, since it uses less digits than its factorization.

37223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143763.

The product of its digits is 1008, while the sum is 22.

The square root of 37223221 is about 6101.0835922810. The cubic root of 37223221 is about 333.8909518867.

Adding to 37223221 its reverse (12232273), we get a palindrome (49455494).

The spelling of 37223221 in words is "thirty-seven million, two hundred twenty-three thousand, two hundred twenty-one".