31030223312 has 160 divisors (see below), whose sum is σ = 72758200320. Its totient is φ = 12654005760.

The previous prime is 31030223297. The next prime is 31030223333. The reversal of 31030223312 is 21332203013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7919978 + ... + 7923894.

It is an arithmetic number, because the mean of its divisors is an integer number (454738752).

Almost surely, 2^31030223312 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 31030223312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36379100160).

31030223312 is an abundant number, since it is smaller than the sum of its proper divisors (41727977008).

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

31030223312 is a wasteful number, since it uses less digits than its factorization.

31030223312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081 (or 4075 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31030223312 its reverse (21332203013), we get a palindrome (52362426325).

The spelling of 31030223312 in words is "thirty-one billion, thirty million, two hundred twenty-three thousand, three hundred twelve".