2164515061 has 4 divisors (see below), whose sum is σ = 2164617324. Its totient is φ = 2164412800.

The previous prime is 2164515053. The next prime is 2164515083. The reversal of 2164515061 is 1605154612.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1675264900 + 489250161 = 40930^2 + 22119^2 .

It is a cyclic number.

It is not a de Polignac number, because 2164515061 - 2³ = 2164515053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164515011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6250 + ... + 66091.

It is an arithmetic number, because the mean of its divisors is an integer number (541154331).

Almost surely, 2^2164515061 is an apocalyptic number.

It is an amenable number.

2164515061 is a deficient number, since it is larger than the sum of its proper divisors (102263).

2164515061 is an equidigital number, since it uses as much as digits as its factorization.

2164515061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102262.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 2164515061 is about 46524.3491195739. The cubic root of 2164515061 is about 1293.5608727372.

Adding to 2164515061 its reverse (1605154612), we get a palindrome (3769669673).

The spelling of 2164515061 in words is "two billion, one hundred sixty-four million, five hundred fifteen thousand, sixty-one".