2166131 has 8 divisors (see below), whose sum is σ = 2377728. Its totient is φ = 1957000.

The previous prime is 2166127. The next prime is 2166137. The reversal of 2166131 is 1316612.

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

It is a cyclic number.

It is not a de Polignac number, because 2166131 - 2² = 2166127 is a prime.

It is a super-2 number, since 2×2166131² = 9384247018322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166137) 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, 1586 + ... + 2616.

It is an arithmetic number, because the mean of its divisors is an integer number (297216).

2^2166131 is an apocalyptic number.

2166131 is a deficient number, since it is larger than the sum of its proper divisors (211597).

2166131 is a wasteful number, since it uses less digits than its factorization.

2166131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233.

The product of its digits is 216, while the sum is 20.

The square root of 2166131 is about 1471.7781762209. The cubic root of 2166131 is about 129.3882699326.

The spelling of 2166131 in words is "two million, one hundred sixty-six thousand, one hundred thirty-one".