2171111064 has 16 divisors (see below), whose sum is σ = 5427777720. Its totient is φ = 723703680.

The previous prime is 2171111053. The next prime is 2171111099. The reversal of 2171111064 is 4601111712.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 90462961 = 2171111064 / (2 + 1 + 7 + 1 + 1 + 1 + 1 + 0 + 6 + 4).

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 45231457 + ... + 45231504.

Almost surely, 2^2171111064 is an apocalyptic number.

2171111064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2171111064 is an abundant number, since it is smaller than the sum of its proper divisors (3256666656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2171111064 is a wasteful number, since it uses less digits than its factorization.

2171111064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90462970 (or 90462966 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 24.

The square root of 2171111064 is about 46595.1828411479. The cubic root of 2171111064 is about 1294.8735114950.

Adding to 2171111064 its reverse (4601111712), we get a palindrome (6772222776).

The spelling of 2171111064 in words is "two billion, one hundred seventy-one million, one hundred eleven thousand, sixty-four".