2164821910 has 16 divisors (see below), whose sum is σ = 3898174896. Its totient is φ = 865596448.

The previous prime is 2164821907. The next prime is 2164821917. The reversal of 2164821910 is 191284612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164821917) 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, 13264 + ... + 67123.

It is an arithmetic number, because the mean of its divisors is an integer number (243635931).

Almost surely, 2^2164821910 is an apocalyptic number.

2164821910 is a deficient number, since it is larger than the sum of its proper divisors (1733352986).

2164821910 is a wasteful number, since it uses less digits than its factorization.

2164821910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83087.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 2164821910 is about 46527.6467275103. The cubic root of 2164821910 is about 1293.6219963752.

The spelling of 2164821910 in words is "two billion, one hundred sixty-four million, eight hundred twenty-one thousand, nine hundred ten".