2166825291 has 8 divisors (see below), whose sum is σ = 2910189264. Its totient is φ = 1434005760.

The previous prime is 2166825233. The next prime is 2166825293. The reversal of 2166825291 is 1925286612.

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

It is not a de Polignac number, because 2166825291 - 2¹⁴ = 2166808907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2166825293) 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, 2635630 + ... + 2636451.

It is an arithmetic number, because the mean of its divisors is an integer number (363773658).

Almost surely, 2^2166825291 is an apocalyptic number.

2166825291 is a deficient number, since it is larger than the sum of its proper divisors (743363973).

2166825291 is a wasteful number, since it uses less digits than its factorization.

2166825291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5272221.

The product of its digits is 103680, while the sum is 42.

The square root of 2166825291 is about 46549.1706800454. The cubic root of 2166825291 is about 1294.0209235230.

The spelling of 2166825291 in words is "two billion, one hundred sixty-six million, eight hundred twenty-five thousand, two hundred ninety-one".