213023431406 has 32 divisors (see below), whose sum is σ = 348243770880. Its totient is φ = 97447068576.

The previous prime is 213023431403. The next prime is 213023431441. The reversal of 213023431406 is 604134320312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213023431403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 960266 + ... + 1161101.

It is an arithmetic number, because the mean of its divisors is an integer number (10882617840).

Almost surely, 2^213023431406 is an apocalyptic number.

213023431406 is a deficient number, since it is larger than the sum of its proper divisors (135220339474).

213023431406 is a wasteful number, since it uses less digits than its factorization.

213023431406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121488.

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

Adding to 213023431406 its reverse (604134320312), we get a palindrome (817157751718).

The spelling of 213023431406 in words is "two hundred thirteen billion, twenty-three million, four hundred thirty-one thousand, four hundred six".