372006221 has 2 divisors, whose sum is σ = 372006222. Its totient is φ = 372006220.

The previous prime is 372006199. The next prime is 372006227. The reversal of 372006221 is 122600273.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 370986121 + 1020100 = 19261^2 + 1010^2 .

It is an emirp because it is prime and its reverse (122600273) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 372006221 - 2¹⁴ = 371989837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (372006227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186003110 + 186003111.

It is an arithmetic number, because the mean of its divisors is an integer number (186003111).

Almost surely, 2^372006221 is an apocalyptic number.

It is an amenable number.

372006221 is a deficient number, since it is larger than the sum of its proper divisors (1).

372006221 is an equidigital number, since it uses as much as digits as its factorization.

372006221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 372006221 is about 19287.4627932240. The cubic root of 372006221 is about 719.2006438626.

Adding to 372006221 its reverse (122600273), we get a palindrome (494606494).

The spelling of 372006221 in words is "three hundred seventy-two million, six thousand, two hundred twenty-one".