43172213 has 8 divisors (see below), whose sum is σ = 51041280. Its totient is φ = 35728560.

The previous prime is 43172177. The next prime is 43172249. The reversal of 43172213 is 31227134.

It is an interprime number because it is at equal distance from previous prime (43172177) and next prime (43172249).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43172213 - 2¹⁶ = 43106677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43142213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106133 + ... + 106538.

It is an arithmetic number, because the mean of its divisors is an integer number (6380160).

Almost surely, 2^43172213 is an apocalyptic number.

It is an amenable number.

43172213 is a deficient number, since it is larger than the sum of its proper divisors (7869067).

43172213 is a wasteful number, since it uses less digits than its factorization.

43172213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212707.

The product of its digits is 1008, while the sum is 23.

The square root of 43172213 is about 6570.5565213306. The cubic root of 43172213 is about 350.8068812638.

Adding to 43172213 its reverse (31227134), we get a palindrome (74399347).

The spelling of 43172213 in words is "forty-three million, one hundred seventy-two thousand, two hundred thirteen".