31233200213 has 4 divisors (see below), whose sum is σ = 31235812608. Its totient is φ = 31230587820.

The previous prime is 31233200191. The next prime is 31233200233. The reversal of 31233200213 is 31200233213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31233200213 - 2⁶ = 31233200149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31233200233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1288181 + ... + 1312202.

It is an arithmetic number, because the mean of its divisors is an integer number (7808953152).

Almost surely, 2^31233200213 is an apocalyptic number.

It is an amenable number.

31233200213 is a deficient number, since it is larger than the sum of its proper divisors (2612395).

31233200213 is a wasteful number, since it uses less digits than its factorization.

31233200213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612394.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31233200213 its reverse (31200233213), we get a palindrome (62433433426).

The spelling of 31233200213 in words is "thirty-one billion, two hundred thirty-three million, two hundred thousand, two hundred thirteen".