172211005 has 16 divisors (see below), whose sum is σ = 216783360. Its totient is φ = 131079168.

The previous prime is 172210993. The next prime is 172211009. The reversal of 172211005 is 500112271.

172211005 = T₄₆ + T₄₇ + ... + T₁₀₁₀.

It is a cyclic number.

It is not a de Polignac number, because 172211005 - 2¹³ = 172202813 is a prime.

It is a super-2 number, since 2×172211005² = 59313260486220050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172211009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18316 + ... + 26074.

It is an arithmetic number, because the mean of its divisors is an integer number (13548960).

Almost surely, 2^172211005 is an apocalyptic number.

It is an amenable number.

172211005 is a deficient number, since it is larger than the sum of its proper divisors (44572355).

172211005 is a wasteful number, since it uses less digits than its factorization.

172211005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7980.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 172211005 is about 13122.9190731331. The cubic root of 172211005 is about 556.3570987655.

Adding to 172211005 its reverse (500112271), we get a palindrome (672323276).

The spelling of 172211005 in words is "one hundred seventy-two million, two hundred eleven thousand, five".