2172305221633 has 4 divisors (see below), whose sum is σ = 2172506913328. Its totient is φ = 2172103529940.

The previous prime is 2172305221621. The next prime is 2172305221637. The reversal of 2172305221633 is 3361225032712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2172305221633 - 2¹⁷ = 2172305090561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2172305221592 and 2172305221601.

It is not an unprimeable number, because it can be changed into a prime (2172305221637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100829691 + ... + 100851232.

It is an arithmetic number, because the mean of its divisors is an integer number (543126728332).

Almost surely, 2^{2172305221633} is an apocalyptic number.

It is an amenable number.

2172305221633 is a deficient number, since it is larger than the sum of its proper divisors (201691695).

2172305221633 is a wasteful number, since it uses less digits than its factorization.

2172305221633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201691694.

The product of its (nonzero) digits is 90720, while the sum is 37.

The spelling of 2172305221633 in words is "two trillion, one hundred seventy-two billion, three hundred five million, two hundred twenty-one thousand, six hundred thirty-three".