213635042 has 4 divisors (see below), whose sum is σ = 320452566. Its totient is φ = 106817520.

The previous prime is 213635041. The next prime is 213635117. The reversal of 213635042 is 240536312.

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., 169026001 + 44609041 = 13001^2 + 6679^2 .

It is not an unprimeable number, because it can be changed into a prime (213635041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53408759 + ... + 53408762.

Almost surely, 2^213635042 is an apocalyptic number.

213635042 is a deficient number, since it is larger than the sum of its proper divisors (106817524).

213635042 is a wasteful number, since it uses less digits than its factorization.

213635042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106817523.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 213635042 is about 14616.2595078221. The cubic root of 213635042 is about 597.8021832398.

The spelling of 213635042 in words is "two hundred thirteen million, six hundred thirty-five thousand, forty-two".