2151231166 has 8 divisors (see below), whose sum is σ = 3687824880. Its totient is φ = 921956208.

The previous prime is 2151231161. The next prime is 2151231169. The reversal of 2151231166 is 6611321512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151231161) 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, 76829671 + ... + 76829698.

It is an arithmetic number, because the mean of its divisors is an integer number (460978110).

Almost surely, 2^2151231166 is an apocalyptic number.

2151231166 is a deficient number, since it is larger than the sum of its proper divisors (1536593714).

2151231166 is a wasteful number, since it uses less digits than its factorization.

2151231166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153659378.

The product of its digits is 2160, while the sum is 28.

The square root of 2151231166 is about 46381.3665818505. The cubic root of 2151231166 is about 1290.9091933939.

Adding to 2151231166 its reverse (6611321512), we get a palindrome (8762552678).

The spelling of 2151231166 in words is "two billion, one hundred fifty-one million, two hundred thirty-one thousand, one hundred sixty-six".