213431244242 has 16 divisors (see below), whose sum is σ = 326178619200. Its totient is φ = 104722296432.

The previous prime is 213431244211. The next prime is 213431244251. The reversal of 213431244242 is 242442134312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 213431244199 and 213431244208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4289798 + ... + 4339265.

It is an arithmetic number, because the mean of its divisors is an integer number (20386163700).

Almost surely, 2^213431244242 is an apocalyptic number.

213431244242 is a deficient number, since it is larger than the sum of its proper divisors (112747374958).

213431244242 is a wasteful number, since it uses less digits than its factorization.

213431244242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8629297.

The product of its digits is 36864, while the sum is 32.

Adding to 213431244242 its reverse (242442134312), we get a palindrome (455873378554).

The spelling of 213431244242 in words is "two hundred thirteen billion, four hundred thirty-one million, two hundred forty-four thousand, two hundred forty-two".