213504233 has 2 divisors, whose sum is σ = 213504234. Its totient is φ = 213504232.

The previous prime is 213504229. The next prime is 213504251. The reversal of 213504233 is 332405312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184742464 + 28761769 = 13592^2 + 5363^2 .

It is a cyclic number.

It is not a de Polignac number, because 213504233 - 2² = 213504229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213504199 and 213504208.

It is not a weakly prime, because it can be changed into another prime (213504253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106752116 + 106752117.

It is an arithmetic number, because the mean of its divisors is an integer number (106752117).

Almost surely, 2^213504233 is an apocalyptic number.

It is an amenable number.

213504233 is a deficient number, since it is larger than the sum of its proper divisors (1).

213504233 is an equidigital number, since it uses as much as digits as its factorization.

213504233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 213504233 is about 14611.7840457625. The cubic root of 213504233 is about 597.6801466571.

Adding to 213504233 its reverse (332405312), we get a palindrome (545909545).

The spelling of 213504233 in words is "two hundred thirteen million, five hundred four thousand, two hundred thirty-three".