2231569966 has 4 divisors (see below), whose sum is σ = 3347354952. Its totient is φ = 1115784982.

The previous prime is 2231569943. The next prime is 2231569987. The reversal of 2231569966 is 6699651322.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×2231569966³ (a number of 29 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557892490 + ... + 557892493.

It is an arithmetic number, because the mean of its divisors is an integer number (836838738).

Almost surely, 2^2231569966 is an apocalyptic number.

2231569966 is a deficient number, since it is larger than the sum of its proper divisors (1115784986).

2231569966 is a wasteful number, since it uses less digits than its factorization.

2231569966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115784985.

The product of its digits is 1049760, while the sum is 49.

The square root of 2231569966 is about 47239.4958271148. The cubic root of 2231569966 is about 1306.7830797325.

The spelling of 2231569966 in words is "two billion, two hundred thirty-one million, five hundred sixty-nine thousand, nine hundred sixty-six".