2155166 has 8 divisors (see below), whose sum is σ = 3481464. Its totient is φ = 994680.

The previous prime is 2155163. The next prime is 2155171. The reversal of 2155166 is 6615512.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 82891 = 2155166 / (2 + 1 + 5 + 5 + 1 + 6 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155163) 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, 41420 + ... + 41471.

It is an arithmetic number, because the mean of its divisors is an integer number (435183).

2^2155166 is an apocalyptic number.

2155166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2155166 is a deficient number, since it is larger than the sum of its proper divisors (1326298).

2155166 is a wasteful number, since it uses less digits than its factorization.

2155166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82906.

The product of its digits is 1800, while the sum is 26.

The square root of 2155166 is about 1468.0483643259. The cubic root of 2155166 is about 129.1695784752.

The spelling of 2155166 in words is "two million, one hundred fifty-five thousand, one hundred sixty-six".