172051720022 has 32 divisors (see below), whose sum is σ = 317655922752. Its totient is φ = 68059707264.

The previous prime is 172051720003. The next prime is 172051720033. The reversal of 172051720022 is 220027150271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3901448 + ... + 3945300.

It is an arithmetic number, because the mean of its divisors is an integer number (9926747586).

Almost surely, 2^172051720022 is an apocalyptic number.

172051720022 is a deficient number, since it is larger than the sum of its proper divisors (145604202730).

172051720022 is a wasteful number, since it uses less digits than its factorization.

172051720022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65432.

The product of its (nonzero) digits is 3920, while the sum is 29.

Adding to 172051720022 its reverse (220027150271), we get a palindrome (392078870293).

The spelling of 172051720022 in words is "one hundred seventy-two billion, fifty-one million, seven hundred twenty thousand, twenty-two".