2172305221634 has 4 divisors (see below), whose sum is σ = 3258457832454. Its totient is φ = 1086152610816.

The previous prime is 2172305221621. The next prime is 2172305221637. The reversal of 2172305221634 is 4361225032712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1610622424609 + 561682797025 = 1269103^2 + 749455^2 .

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 as a sum of consecutive naturals, namely, 543076305407 + ... + 543076305410.

Almost surely, 2^{2172305221634} is an apocalyptic number.

2172305221634 is a deficient number, since it is larger than the sum of its proper divisors (1086152610820).

2172305221634 is a wasteful number, since it uses less digits than its factorization.

2172305221634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086152610819.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 2172305221634 in words is "two trillion, one hundred seventy-two billion, three hundred five million, two hundred twenty-one thousand, six hundred thirty-four".