213045634 has 4 divisors (see below), whose sum is σ = 319568454. Its totient is φ = 106522816.

The previous prime is 213045601. The next prime is 213045661. The reversal of 213045634 is 436540312.

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

It can be written as a sum of positive squares in only one way, i.e., 205836409 + 7209225 = 14347^2 + 2685^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53261407 + ... + 53261410.

Almost surely, 2^213045634 is an apocalyptic number.

213045634 is a deficient number, since it is larger than the sum of its proper divisors (106522820).

213045634 is a wasteful number, since it uses less digits than its factorization.

213045634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106522819.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 213045634 is about 14596.0828306776. The cubic root of 213045634 is about 597.2519084637.

Adding to 213045634 its reverse (436540312), we get a palindrome (649585946).

The spelling of 213045634 in words is "two hundred thirteen million, forty-five thousand, six hundred thirty-four".