37023221 has 2 divisors, whose sum is σ = 37023222. Its totient is φ = 37023220.

The previous prime is 37023209. The next prime is 37023223. The reversal of 37023221 is 12232073.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33466225 + 3556996 = 5785^2 + 1886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37023221 is a prime.

Together with 37023223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 37023193 and 37023202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37023223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18511610 + 18511611.

It is an arithmetic number, because the mean of its divisors is an integer number (18511611).

Almost surely, 2^37023221 is an apocalyptic number.

It is an amenable number.

37023221 is a deficient number, since it is larger than the sum of its proper divisors (1).

37023221 is an equidigital number, since it uses as much as digits as its factorization.

37023221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 37023221 is about 6084.6709853533. The cubic root of 37023221 is about 333.2918800673.

Adding to 37023221 its reverse (12232073), we get a palindrome (49255294).

The spelling of 37023221 in words is "thirty-seven million, twenty-three thousand, two hundred twenty-one".