2373221 has 2 divisors, whose sum is σ = 2373222.
Its totient is φ = 2373220.
The previous prime is 2373211. The next prime is 2373227. The reversal of 2373221 is 1223732.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 2070721 + 302500 = 1439^2 + 550^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-2373221 is a prime.
It is a Chen prime.
It is a junction number, because it is equal to n+sod(n) for n = 2373193 and 2373202.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2373227) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1186610 + 1186611.
It is an arithmetic number, because the mean of its divisors is an integer number (1186611).
22373221 is an apocalyptic number.
It is an amenable number.
2373221 is a deficient number, since it is larger than the sum of its proper divisors (1).
2373221 is an equidigital number, since it uses as much as digits as its factorization.
2373221 is an evil number, because the sum of its binary digits is even.
The product of its digits is 504, while the sum is 20.
The square root of 2373221 is about 1540.5262088001.
The cubic root of 2373221 is about 133.3867612270.
Adding to 2373221 its reverse (1223732), we get a palindrome (3596953).
The spelling of 2373221 in words is "two million, three hundred seventy-three thousand, two hundred twenty-one".