2164754821 has 2 divisors, whose sum is σ = 2164754822. Its totient is φ = 2164754820.

The previous prime is 2164754783. The next prime is 2164754827. The reversal of 2164754821 is 1284574612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1903576900 + 261177921 = 43630^2 + 16161^2 .

It is a cyclic number.

It is not a de Polignac number, because 2164754821 - 2⁷ = 2164754693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2164754827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082377410 + 1082377411.

It is an arithmetic number, because the mean of its divisors is an integer number (1082377411).

Almost surely, 2^2164754821 is an apocalyptic number.

It is an amenable number.

2164754821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2164754821 is an equidigital number, since it uses as much as digits as its factorization.

2164754821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 40.

The square root of 2164754821 is about 46526.9257634759. The cubic root of 2164754821 is about 1293.6086328891.

The spelling of 2164754821 in words is "two billion, one hundred sixty-four million, seven hundred fifty-four thousand, eight hundred twenty-one".