2164772087 has 16 divisors (see below), whose sum is σ = 2339121120. Its totient is φ = 1997136000.

The previous prime is 2164772083. The next prime is 2164772111. The reversal of 2164772087 is 7802774612.

2164772087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2164772087 - 2² = 2164772083 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164772083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107813 + ... + 126305.

It is an arithmetic number, because the mean of its divisors is an integer number (146195070).

Almost surely, 2^2164772087 is an apocalyptic number.

2164772087 is a deficient number, since it is larger than the sum of its proper divisors (174349033).

2164772087 is a wasteful number, since it uses less digits than its factorization.

2164772087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18674.

The product of its (nonzero) digits is 263424, while the sum is 44.

The square root of 2164772087 is about 46527.1113115783. Note that the first 3 decimals coincide. The cubic root of 2164772087 is about 1293.6120721373.

The spelling of 2164772087 in words is "two billion, one hundred sixty-four million, seven hundred seventy-two thousand, eighty-seven".