31230135223 has 4 divisors (see below), whose sum is σ = 35691583120. Its totient is φ = 26768687328.

The previous prime is 31230135203. The next prime is 31230135239. The reversal of 31230135223 is 32253103213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31230135223 - 2²⁹ = 30693264311 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 (31230135203) 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, 2230723938 + ... + 2230723951.

It is an arithmetic number, because the mean of its divisors is an integer number (8922895780).

Almost surely, 2^31230135223 is an apocalyptic number.

31230135223 is a deficient number, since it is larger than the sum of its proper divisors (4461447897).

31230135223 is an equidigital number, since it uses as much as digits as its factorization.

31230135223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4461447896.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 31230135223 its reverse (32253103213), we get a palindrome (63483238436).

The spelling of 31230135223 in words is "thirty-one billion, two hundred thirty million, one hundred thirty-five thousand, two hundred twenty-three".