31240043331432 has 128 divisors (see below), whose sum is σ = 86893286968320. Its totient is φ = 9294497280000.

The previous prime is 31240043331379. The next prime is 31240043331433. The reversal of 31240043331432 is 23413334004213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31240043331393 and 31240043331402.

It is not an unprimeable number, because it can be changed into a prime (31240043331433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10271382 + ... + 12960762.

It is an arithmetic number, because the mean of its divisors is an integer number (678853804440).

Almost surely, 2^{31240043331432} 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 31240043331432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43446643484160).

31240043331432 is an abundant number, since it is smaller than the sum of its proper divisors (55653243636888).

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

31240043331432 is a wasteful number, since it uses less digits than its factorization.

31240043331432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690635 (or 2690631 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 33.

Adding to 31240043331432 its reverse (23413334004213), we get a palindrome (54653377335645).

The spelling of 31240043331432 in words is "thirty-one trillion, two hundred forty billion, forty-three million, three hundred thirty-one thousand, four hundred thirty-two".