2166100441 has 4 divisors (see below), whose sum is σ = 2293518132. Its totient is φ = 2038682752.

The previous prime is 2166100411. The next prime is 2166100459. The reversal of 2166100441 is 1440016612.

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

It can be written as a sum of positive squares in 2 ways, for example, as 898740441 + 1267360000 = 29979^2 + 35600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2166100441 is a prime.

It is a super-2 number, since 2×2166100441² = 9383982241000788962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166100411) 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, 63708820 + ... + 63708853.

It is an arithmetic number, because the mean of its divisors is an integer number (573379533).

Almost surely, 2^2166100441 is an apocalyptic number.

It is an amenable number.

2166100441 is a deficient number, since it is larger than the sum of its proper divisors (127417691).

2166100441 is a wasteful number, since it uses less digits than its factorization.

2166100441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127417690.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2166100441 is about 46541.3841758064. The cubic root of 2166100441 is about 1293.8766147532.

The spelling of 2166100441 in words is "two billion, one hundred sixty-six million, one hundred thousand, four hundred forty-one".