2151166111 has 8 divisors (see below), whose sum is σ = 2397584880. Its totient is φ = 1918067328.

The previous prime is 2151166109. The next prime is 2151166141. The reversal of 2151166111 is 1116611512.

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

It is not a de Polignac number, because 2151166111 - 2¹ = 2151166109 is a prime.

It is a super-2 number, since 2×2151166111² = 9255031274229728642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151166141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3329656 + ... + 3330301.

It is an arithmetic number, because the mean of its divisors is an integer number (299698110).

Almost surely, 2^2151166111 is an apocalyptic number.

2151166111 is a deficient number, since it is larger than the sum of its proper divisors (246418769).

2151166111 is a wasteful number, since it uses less digits than its factorization.

2151166111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6659993.

The product of its digits is 360, while the sum is 25.

The square root of 2151166111 is about 46380.6652712097. The cubic root of 2151166111 is about 1290.8961805441.

Adding to 2151166111 its reverse (1116611512), we get a palindrome (3267777623).

The spelling of 2151166111 in words is "two billion, one hundred fifty-one million, one hundred sixty-six thousand, one hundred eleven".