172223982 has 80 divisors (see below), whose sum is σ = 456334560. Its totient is φ = 47500992.

The previous prime is 172223981. The next prime is 172223983. The reversal of 172223982 is 289322271.

It is an interprime number because it is at equal distance from previous prime (172223981) and next prime (172223983).

It is a super-2 number, since 2×172223982² = 59322199951872648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172223981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 30268 + ... + 35504.

It is an arithmetic number, because the mean of its divisors is an integer number (5704182).

Almost surely, 2^172223982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172223982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228167280).

172223982 is an abundant number, since it is smaller than the sum of its proper divisors (284110578).

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

172223982 is a wasteful number, since it uses less digits than its factorization.

172223982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5287 (or 5278 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 172223982 is about 13123.4135041155. The cubic root of 172223982 is about 556.3710732203.

The spelling of 172223982 in words is "one hundred seventy-two million, two hundred twenty-three thousand, nine hundred eighty-two".