2172652221 has 8 divisors (see below), whose sum is σ = 2958505344. Its totient is φ = 1417616960.

The previous prime is 2172652217. The next prime is 2172652249. The reversal of 2172652221 is 1222562712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2172652221 - 2² = 2172652217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172652211) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7704300 + ... + 7704581.

It is an arithmetic number, because the mean of its divisors is an integer number (369813168).

Almost surely, 2^2172652221 is an apocalyptic number.

It is an amenable number.

2172652221 is a deficient number, since it is larger than the sum of its proper divisors (785853123).

2172652221 is a wasteful number, since it uses less digits than its factorization.

2172652221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15408931.

The product of its digits is 6720, while the sum is 30.

The square root of 2172652221 is about 46611.7176362339. The cubic root of 2172652221 is about 1295.1798264512.

The spelling of 2172652221 in words is "two billion, one hundred seventy-two million, six hundred fifty-two thousand, two hundred twenty-one".