213023633 has 4 divisors (see below), whose sum is σ = 213273060. Its totient is φ = 212774208.

The previous prime is 213023609. The next prime is 213023639. The reversal of 213023633 is 336320312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 137194369 + 75829264 = 11713^2 + 8708^2 .

It is a cyclic number.

It is not a de Polignac number, because 213023633 - 2¹⁰ = 213022609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213023599 and 213023608.

It is not an unprimeable number, because it can be changed into a prime (213023639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123428 + ... + 125141.

It is an arithmetic number, because the mean of its divisors is an integer number (53318265).

Almost surely, 2^213023633 is an apocalyptic number.

It is an amenable number.

213023633 is a deficient number, since it is larger than the sum of its proper divisors (249427).

213023633 is an equidigital number, since it uses as much as digits as its factorization.

213023633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249426.

The product of its (nonzero) digits is 1944, while the sum is 23.

The square root of 213023633 is about 14595.3291501083. The cubic root of 213023633 is about 597.2313485625.

Adding to 213023633 its reverse (336320312), we get a palindrome (549343945).

The spelling of 213023633 in words is "two hundred thirteen million, twenty-three thousand, six hundred thirty-three".