2171505064 has 16 divisors (see below), whose sum is σ = 4311076500. Its totient is φ = 1021884672.

The previous prime is 2171505053. The next prime is 2171505097. The reversal of 2171505064 is 4605051712.

It can be written as a sum of positive squares in 2 ways, for example, as 1926332100 + 245172964 = 43890^2 + 15658^2 .

It is an unprimeable number.

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, 7983339 + ... + 7983610.

Almost surely, 2^2171505064 is an apocalyptic number.

It is an amenable number.

2171505064 is a deficient number, since it is larger than the sum of its proper divisors (2139571436).

2171505064 is a wasteful number, since it uses less digits than its factorization.

2171505064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15966972 (or 15966968 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 2171505064 is about 46599.4105542119. The cubic root of 2171505064 is about 1294.9518353409.

Adding to 2171505064 its reverse (4605051712), we get a palindrome (6776556776).

The spelling of 2171505064 in words is "two billion, one hundred seventy-one million, five hundred five thousand, sixty-four".