31031231223 has 8 divisors (see below), whose sum is σ = 41395743088. Its totient is φ = 20677103424.

The previous prime is 31031231221. The next prime is 31031231233. The reversal of 31031231223 is 32213213013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31031231223 - 2¹ = 31031231221 is a prime.

It is a super-2 number, since 2×31031231223² (a number of 22 digits) contains 22 as substring.

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 31031231223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031231221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2589040 + ... + 2600997.

It is an arithmetic number, because the mean of its divisors is an integer number (5174467886).

Almost surely, 2^31031231223 is an apocalyptic number.

31031231223 is a deficient number, since it is larger than the sum of its proper divisors (10364511865).

31031231223 is a wasteful number, since it uses less digits than its factorization.

31031231223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5192033.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31031231223 its reverse (32213213013), we get a palindrome (63244444236).

The spelling of 31031231223 in words is "thirty-one billion, thirty-one million, two hundred thirty-one thousand, two hundred twenty-three".