172242213 has 32 divisors (see below), whose sum is σ = 271434240. Its totient is φ = 95778240.

The previous prime is 172242211. The next prime is 172242229. The reversal of 172242213 is 312242271.

It is not a de Polignac number, because 172242213 - 2¹ = 172242211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172242211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75670 + ... + 77912.

It is an arithmetic number, because the mean of its divisors is an integer number (8482320).

Almost surely, 2^172242213 is an apocalyptic number.

172242213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

172242213 is a deficient number, since it is larger than the sum of its proper divisors (99192027).

172242213 is a wasteful number, since it uses less digits than its factorization.

172242213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449.

The product of its digits is 1344, while the sum is 24.

The square root of 172242213 is about 13124.1080839804. The cubic root of 172242213 is about 556.3907043290.

Adding to 172242213 its reverse (312242271), we get a palindrome (484484484).

The spelling of 172242213 in words is "one hundred seventy-two million, two hundred forty-two thousand, two hundred thirteen".