31200240223 has 4 divisors (see below), whose sum is σ = 31627640848. Its totient is φ = 30772839600.

The previous prime is 31200240151. The next prime is 31200240251. The reversal of 31200240223 is 32204200213.

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 31200240223 - 2²¹ = 31198143071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31200240223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200240523) 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, 213700203 + ... + 213700348.

It is an arithmetic number, because the mean of its divisors is an integer number (7906910212).

Almost surely, 2^31200240223 is an apocalyptic number.

31200240223 is a deficient number, since it is larger than the sum of its proper divisors (427400625).

31200240223 is an equidigital number, since it uses as much as digits as its factorization.

31200240223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427400624.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 31200240223 its reverse (32204200213), we get a palindrome (63404440436).

The spelling of 31200240223 in words is "thirty-one billion, two hundred million, two hundred forty thousand, two hundred twenty-three".