213423131234 has 4 divisors (see below), whose sum is σ = 320134696854. Its totient is φ = 106711565616.

The previous prime is 213423131227. The next prime is 213423131261. The reversal of 213423131234 is 432131324312.

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., 128878846009 + 84544285225 = 358997^2 + 290765^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213423131197 and 213423131206.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53355782807 + ... + 53355782810.

Almost surely, 2^213423131234 is an apocalyptic number.

213423131234 is a deficient number, since it is larger than the sum of its proper divisors (106711565620).

213423131234 is a wasteful number, since it uses less digits than its factorization.

213423131234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106711565619.

The product of its digits is 10368, while the sum is 29.

Adding to 213423131234 its reverse (432131324312), we get a palindrome (645554455546).

The spelling of 213423131234 in words is "two hundred thirteen billion, four hundred twenty-three million, one hundred thirty-one thousand, two hundred thirty-four".