213520033042 has 4 divisors (see below), whose sum is σ = 320280049566. Its totient is φ = 106760016520.

The previous prime is 213520033021. The next prime is 213520033043. The reversal of 213520033042 is 240330025312.

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., 155661022521 + 57859010521 = 394539^2 + 240539^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213520032998 and 213520033016.

It is not an unprimeable number, because it can be changed into a prime (213520033043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53380008259 + ... + 53380008262.

Almost surely, 2^213520033042 is an apocalyptic number.

213520033042 is a deficient number, since it is larger than the sum of its proper divisors (106760016524).

213520033042 is a wasteful number, since it uses less digits than its factorization.

213520033042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106760016523.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 213520033042 its reverse (240330025312), we get a palindrome (453850058354).

The spelling of 213520033042 in words is "two hundred thirteen billion, five hundred twenty million, thirty-three thousand, forty-two".