31212230224 has 160 divisors (see below), whose sum is σ = 73656000000. Its totient is φ = 12525207552.

The previous prime is 31212230207. The next prime is 31212230263. The reversal of 31212230224 is 42203221213.

It is a junction number, because it is equal to n+sod(n) for n = 31212230195 and 31212230204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24989152 + ... + 24990400.

It is an arithmetic number, because the mean of its divisors is an integer number (460350000).

Almost surely, 2^31212230224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31212230224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36828000000).

31212230224 is an abundant number, since it is smaller than the sum of its proper divisors (42443769776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31212230224 is a wasteful number, since it uses less digits than its factorization.

31212230224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485 (or 1479 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31212230224 its reverse (42203221213), we get a palindrome (73415451437).

The spelling of 31212230224 in words is "thirty-one billion, two hundred twelve million, two hundred thirty thousand, two hundred twenty-four".