2198661 has 16 divisors (see below), whose sum is σ = 3268800. Its totient is φ = 1306368.

The previous prime is 2198659. The next prime is 2198663. The reversal of 2198661 is 1668912.

It is an interprime number because it is at equal distance from previous prime (2198659) and next prime (2198663).

It is not a de Polignac number, because 2198661 - 2¹ = 2198659 is a prime.

It is a super-2 number, since 2×2198661² = 9668220385842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2198663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166 + ... + 2103.

It is an arithmetic number, because the mean of its divisors is an integer number (204300).

2^2198661 is an apocalyptic number.

It is an amenable number.

2198661 is a deficient number, since it is larger than the sum of its proper divisors (1070139).

2198661 is a wasteful number, since it uses less digits than its factorization.

2198661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308.

The product of its digits is 5184, while the sum is 33.

The square root of 2198661 is about 1482.7882519092. The cubic root of 2198661 is about 130.0327530885.

The spelling of 2198661 in words is "two million, one hundred ninety-eight thousand, six hundred sixty-one".