213432633 has 6 divisors (see below), whose sum is σ = 308291594. Its totient is φ = 142288416.

The previous prime is 213432563. The next prime is 213432647. The reversal of 213432633 is 336234312.

It is a happy number.

213432633 is a `hidden beast` number, since 21 + 3 + 4 + 3 + 2 + 633 = 666.

It can be written as a sum of positive squares in only one way, i.e., 169833024 + 43599609 = 13032^2 + 6603^2 .

It is not a de Polignac number, because 213432633 - 2¹³ = 213424441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213432597 and 213432606.

It is not an unprimeable number, because it can be changed into a prime (213432673) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11857360 + ... + 11857377.

Almost surely, 2^213432633 is an apocalyptic number.

It is an amenable number.

213432633 is a deficient number, since it is larger than the sum of its proper divisors (94858961).

213432633 is a wasteful number, since it uses less digits than its factorization.

213432633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23714743 (or 23714740 counting only the distinct ones).

The product of its digits is 7776, while the sum is 27.

The square root of 213432633 is about 14609.3337630434. Note that the first 3 decimals coincide. The cubic root of 213432633 is about 597.6133272432.

Adding to 213432633 its reverse (336234312), we get a palindrome (549666945).

The spelling of 213432633 in words is "two hundred thirteen million, four hundred thirty-two thousand, six hundred thirty-three".