213142355242 has 4 divisors (see below), whose sum is σ = 319713532866. Its totient is φ = 106571177620.

The previous prime is 213142355219. The next prime is 213142355267. The reversal of 213142355242 is 242553241312.

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., 213103180161 + 39175081 = 461631^2 + 6259^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213142355198 and 213142355207.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53285588809 + ... + 53285588812.

Almost surely, 2^213142355242 is an apocalyptic number.

213142355242 is a deficient number, since it is larger than the sum of its proper divisors (106571177624).

213142355242 is a wasteful number, since it uses less digits than its factorization.

213142355242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106571177623.

The product of its digits is 57600, while the sum is 34.

Adding to 213142355242 its reverse (242553241312), we get a palindrome (455695596554).

The spelling of 213142355242 in words is "two hundred thirteen billion, one hundred forty-two million, three hundred fifty-five thousand, two hundred forty-two".