2231566 has 8 divisors (see below), whose sum is σ = 3455424. Its totient is φ = 1079760.

The previous prime is 2231533. The next prime is 2231587. The reversal of 2231566 is 6651322.

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

It is a super-3 number, since 3×2231566³ = 33338838282906088488, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2231566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17935 + ... + 18058.

It is an arithmetic number, because the mean of its divisors is an integer number (431928).

2^2231566 is an apocalyptic number.

2231566 is a deficient number, since it is larger than the sum of its proper divisors (1223858).

2231566 is a wasteful number, since it uses less digits than its factorization.

2231566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36026.

The product of its digits is 2160, while the sum is 25.

The square root of 2231566 is about 1493.8426958686. The cubic root of 2231566 is about 130.6782305583.

Adding to 2231566 its reverse (6651322), we get a palindrome (8882888).

The spelling of 2231566 in words is "two million, two hundred thirty-one thousand, five hundred sixty-six".