213568172 has 6 divisors (see below), whose sum is σ = 373744308. Its totient is φ = 106784084.

The previous prime is 213568171. The next prime is 213568211. The reversal of 213568172 is 271865312.

It is a happy number.

It is a super-2 number, since 2×213568172² = 91222728182843168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213568171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26696018 + ... + 26696025.

It is an arithmetic number, because the mean of its divisors is an integer number (62290718).

Almost surely, 2^213568172 is an apocalyptic number.

It is an amenable number.

213568172 is a deficient number, since it is larger than the sum of its proper divisors (160176136).

213568172 is a wasteful number, since it uses less digits than its factorization.

213568172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53392047 (or 53392045 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 213568172 is about 14613.9718078283. The cubic root of 213568172 is about 597.7398039547.

It can be divided in two parts, 2135 and 68172, that added together give a palindrome (70307).

The spelling of 213568172 in words is "two hundred thirteen million, five hundred sixty-eight thousand, one hundred seventy-two".