2221557 has 8 divisors (see below), whose sum is σ = 3189984. Its totient is φ = 1367088.

The previous prime is 2221523. The next prime is 2221567. The reversal of 2221557 is 7551222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2221557 - 2⁸ = 2221301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28443 + ... + 28520.

It is an arithmetic number, because the mean of its divisors is an integer number (398748).

2^2221557 is an apocalyptic number.

It is an amenable number.

2221557 is a deficient number, since it is larger than the sum of its proper divisors (968427).

2221557 is a wasteful number, since it uses less digits than its factorization.

2221557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56979.

The product of its digits is 1400, while the sum is 24.

The square root of 2221557 is about 1490.4888459831. The cubic root of 2221557 is about 130.4825654547.

Adding to 2221557 its reverse (7551222), we get a palindrome (9772779).

The spelling of 2221557 in words is "two million, two hundred twenty-one thousand, five hundred fifty-seven".