31212304134 has 64 divisors (see below), whose sum is σ = 69942140928. Its totient is φ = 9203997600.

The previous prime is 31212304117. The next prime is 31212304157. The reversal of 31212304134 is 43140321213.

It is a happy number.

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, 748807 + ... + 789389.

It is an arithmetic number, because the mean of its divisors is an integer number (1092845952).

Almost surely, 2^31212304134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31212304134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34971070464).

31212304134 is an abundant number, since it is smaller than the sum of its proper divisors (38729836794).

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

31212304134 is a wasteful number, since it uses less digits than its factorization.

31212304134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40913.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31212304134 its reverse (43140321213), we get a palindrome (74352625347).

The spelling of 31212304134 in words is "thirty-one billion, two hundred twelve million, three hundred four thousand, one hundred thirty-four".