2171261634 has 16 divisors (see below), whose sum is σ = 4343576160. Its totient is φ = 723578400.

The previous prime is 2171261623. The next prime is 2171261647. The reversal of 2171261634 is 4361621712.

It is a junction number, because it is equal to n+sod(n) for n = 2171261595 and 2171261604.

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 7 ways as a sum of consecutive naturals, for example, 15667 + ... + 67734.

It is an arithmetic number, because the mean of its divisors is an integer number (271473510).

Almost surely, 2^2171261634 is an apocalyptic number.

2171261634 is an abundant number, since it is smaller than the sum of its proper divisors (2172314526).

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

2171261634 is a wasteful number, since it uses less digits than its factorization.

2171261634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87745.

The product of its digits is 12096, while the sum is 33.

The square root of 2171261634 is about 46596.7985380970. The cubic root of 2171261634 is about 1294.9034446478.

The spelling of 2171261634 in words is "two billion, one hundred seventy-one million, two hundred sixty-one thousand, six hundred thirty-four".