31240214012 has 72 divisors (see below), whose sum is σ = 64423497600. Its totient is φ = 13215436416.

The previous prime is 31240214003. The next prime is 31240214041. The reversal of 31240214012 is 21041204213.

It is a super-2 number, since 2×31240214012² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5915189 + ... + 5920467.

It is an arithmetic number, because the mean of its divisors is an integer number (894770800).

Almost surely, 2^31240214012 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 31240214012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32211748800).

31240214012 is an abundant number, since it is smaller than the sum of its proper divisors (33183283588).

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

31240214012 is a wasteful number, since it uses less digits than its factorization.

31240214012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5683 (or 5674 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31240214012 its reverse (21041204213), we get a palindrome (52281418225).

The spelling of 31240214012 in words is "thirty-one billion, two hundred forty million, two hundred fourteen thousand, twelve".