213442323 has 16 divisors (see below), whose sum is σ = 297450240. Its totient is φ = 135885024.

The previous prime is 213442319. The next prime is 213442343. The reversal of 213442323 is 323244312.

It is not a de Polignac number, because 213442323 - 2² = 213442319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213442293 and 213442302.

It is not an unprimeable number, because it can be changed into a prime (213442343) 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, 46740 + ... + 51102.

It is an arithmetic number, because the mean of its divisors is an integer number (18590640).

Almost surely, 2^213442323 is an apocalyptic number.

213442323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

213442323 is a deficient number, since it is larger than the sum of its proper divisors (84007917).

213442323 is a wasteful number, since it uses less digits than its factorization.

213442323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5098.

The product of its digits is 3456, while the sum is 24.

The square root of 213442323 is about 14609.6653965791. The cubic root of 213442323 is about 597.6223711359.

Adding to 213442323 its reverse (323244312), we get a palindrome (536686635).

The spelling of 213442323 in words is "two hundred thirteen million, four hundred forty-two thousand, three hundred twenty-three".