2221157 has 4 divisors (see below), whose sum is σ = 2338080. Its totient is φ = 2104236.

The previous prime is 2221129. The next prime is 2221159. The reversal of 2221157 is 7511222.

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 2221157 - 2¹⁴ = 2204773 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 (2221159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58433 + ... + 58470.

It is an arithmetic number, because the mean of its divisors is an integer number (584520).

2^2221157 is an apocalyptic number.

It is an amenable number.

2221157 is a deficient number, since it is larger than the sum of its proper divisors (116923).

2221157 is a wasteful number, since it uses less digits than its factorization.

2221157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116922.

The product of its digits is 280, while the sum is 20.

The square root of 2221157 is about 1490.3546557783. The cubic root of 2221157 is about 130.4747336864.

Adding to 2221157 its reverse (7511222), we get a palindrome (9732379).

The spelling of 2221157 in words is "two million, two hundred twenty-one thousand, one hundred fifty-seven".