2196557 has 4 divisors (see below), whose sum is σ = 2396256. Its totient is φ = 1996860.

The previous prime is 2196541. The next prime is 2196559. The reversal of 2196557 is 7556912.

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 2196557 - 2⁴ = 2196541 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 (2196559) 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, 99833 + ... + 99854.

It is an arithmetic number, because the mean of its divisors is an integer number (599064).

2^2196557 is an apocalyptic number.

It is an amenable number.

2196557 is a deficient number, since it is larger than the sum of its proper divisors (199699).

2196557 is a wasteful number, since it uses less digits than its factorization.

2196557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199698.

The product of its digits is 18900, while the sum is 35.

The square root of 2196557 is about 1482.0786079018. The cubic root of 2196557 is about 129.9912617401.

It can be divided in two parts, 21965 and 57, that added together give a palindrome (22022).

The spelling of 2196557 in words is "two million, one hundred ninety-six thousand, five hundred fifty-seven".