2221957 has 4 divisors (see below), whose sum is σ = 2227680. Its totient is φ = 2216236.

The previous prime is 2221949. The next prime is 2221969. The reversal of 2221957 is 7591222.

2221957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2221957 - 2³ = 2221949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2233 + ... + 3070.

It is an arithmetic number, because the mean of its divisors is an integer number (556920).

2^2221957 is an apocalyptic number.

It is an amenable number.

2221957 is a deficient number, since it is larger than the sum of its proper divisors (5723).

2221957 is an equidigital number, since it uses as much as digits as its factorization.

2221957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5722.

The product of its digits is 2520, while the sum is 28.

The square root of 2221957 is about 1490.6230241077. The cubic root of 2221957 is about 130.4903962829.

The spelling of 2221957 in words is "two million, two hundred twenty-one thousand, nine hundred fifty-seven".