172212822 has 48 divisors (see below), whose sum is σ = 412270560. Its totient is φ = 51676416.

The previous prime is 172212793. The next prime is 172212823. The reversal of 172212822 is 228212271.

It is a super-2 number, since 2×172212822² = 59314512122407368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172212823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5197 + ... + 19272.

It is an arithmetic number, because the mean of its divisors is an integer number (8588970).

Almost surely, 2^172212822 is an apocalyptic number.

172212822 is an abundant number, since it is smaller than the sum of its proper divisors (240057738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172212822 is a wasteful number, since it uses less digits than its factorization.

172212822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24517 (or 24514 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 172212822 is about 13122.9883029743. The cubic root of 172212822 is about 556.3590554683.

The spelling of 172212822 in words is "one hundred seventy-two million, two hundred twelve thousand, eight hundred twenty-two".