31212344142 has 80 divisors (see below), whose sum is σ = 79994977920. Its totient is φ = 8910566352.

The previous prime is 31212344117. The next prime is 31212344147. The reversal of 31212344142 is 24144321213.

31212344142 is a `hidden beast` number, since 3 + 1 + 212 + 3 + 441 + 4 + 2 = 666.

It is a super-3 number, since 3×31212344142³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212344147) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 1471609 + ... + 1492667.

It is an arithmetic number, because the mean of its divisors is an integer number (999937224).

Almost surely, 2^31212344142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31212344142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39997488960).

31212344142 is an abundant number, since it is smaller than the sum of its proper divisors (48782633778).

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

31212344142 is a wasteful number, since it uses less digits than its factorization.

31212344142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22387 (or 22378 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 31212344142 its reverse (24144321213), we get a palindrome (55356665355).

The spelling of 31212344142 in words is "thirty-one billion, two hundred twelve million, three hundred forty-four thousand, one hundred forty-two".