37116221 has 2 divisors, whose sum is σ = 37116222. Its totient is φ = 37116220.

The previous prime is 37116203. The next prime is 37116239. The reversal of 37116221 is 12261173.

It is a balanced prime because it is at equal distance from previous prime (37116203) and next prime (37116239).

It can be written as a sum of positive squares in only one way, i.e., 23136100 + 13980121 = 4810^2 + 3739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37116221 is a prime.

It is a super-2 number, since 2×37116221² = 2755227722641682, 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 (37116281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18558110 + 18558111.

It is an arithmetic number, because the mean of its divisors is an integer number (18558111).

Almost surely, 2^37116221 is an apocalyptic number.

It is an amenable number.

37116221 is a deficient number, since it is larger than the sum of its proper divisors (1).

37116221 is an equidigital number, since it uses as much as digits as its factorization.

37116221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 23.

The square root of 37116221 is about 6092.3083474164. The cubic root of 37116221 is about 333.5707161303.

Adding to 37116221 its reverse (12261173), we get a palindrome (49377394).

The spelling of 37116221 in words is "thirty-seven million, one hundred sixteen thousand, two hundred twenty-one".