31232230213 has 4 divisors (see below), whose sum is σ = 31232736000. Its totient is φ = 31231724428.

The previous prime is 31232230199. The next prime is 31232230241. The reversal of 31232230213 is 31203223213.

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 31232230213 - 2⁵ = 31232230181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31232230013) 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, 144895 + ... + 288892.

It is an arithmetic number, because the mean of its divisors is an integer number (7808184000).

Almost surely, 2^31232230213 is an apocalyptic number.

It is an amenable number.

31232230213 is a deficient number, since it is larger than the sum of its proper divisors (505787).

31232230213 is an equidigital number, since it uses as much as digits as its factorization.

31232230213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505786.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31232230213 its reverse (31203223213), we get a palindrome (62435453426).

The spelling of 31232230213 in words is "thirty-one billion, two hundred thirty-two million, two hundred thirty thousand, two hundred thirteen".