2171967652 has 24 divisors (see below), whose sum is σ = 3821098680. Its totient is φ = 1080238080.

The previous prime is 2171967631. The next prime is 2171967683. The reversal of 2171967652 is 2567691712.

It can be written as a sum of positive squares in 4 ways, for example, as 1947986496 + 223981156 = 44136^2 + 14966^2 .

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 7 ways as a sum of consecutive naturals, for example, 1213174 + ... + 1214962.

It is an arithmetic number, because the mean of its divisors is an integer number (159212445).

Almost surely, 2^2171967652 is an apocalyptic number.

It is an amenable number.

2171967652 is a deficient number, since it is larger than the sum of its proper divisors (1649131028).

2171967652 is a wasteful number, since it uses less digits than its factorization.

2171967652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3231 (or 3229 counting only the distinct ones).

The product of its digits is 317520, while the sum is 46.

The square root of 2171967652 is about 46604.3737432443. The cubic root of 2171967652 is about 1295.0437818067.

The spelling of 2171967652 in words is "two billion, one hundred seventy-one million, nine hundred sixty-seven thousand, six hundred fifty-two".