31204333213144 has 128 divisors (see below), whose sum is σ = 73964966544000. Its totient is φ = 12009513185280.

The previous prime is 31204333213099. The next prime is 31204333213217. The reversal of 31204333213144 is 44131233340213.

It is a super-2 number, since 2×31204333213144² (a number of 28 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 31 ways as a sum of consecutive naturals, for example, 243679854 + ... + 243807874.

It is an arithmetic number, because the mean of its divisors is an integer number (577851301125).

Almost surely, 2^{31204333213144} 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 31204333213144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36982483272000).

31204333213144 is an abundant number, since it is smaller than the sum of its proper divisors (42760633330856).

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

31204333213144 is a wasteful number, since it uses less digits than its factorization.

31204333213144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137133 (or 137129 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 34.

Adding to 31204333213144 its reverse (44131233340213), we get a palindrome (75335566553357).

The spelling of 31204333213144 in words is "thirty-one trillion, two hundred four billion, three hundred thirty-three million, two hundred thirteen thousand, one hundred forty-four".