31433244402 has 64 divisors (see below), whose sum is σ = 74550309120. Its totient is φ = 8648073216.

The previous prime is 31433244383. The next prime is 31433244407. The reversal of 31433244402 is 20444233413.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31433244402.

It is not an unprimeable number, because it can be changed into a prime (31433244407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46474 + ... + 255002.

It is an arithmetic number, because the mean of its divisors is an integer number (1164848580).

Almost surely, 2^31433244402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31433244402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37275154560).

31433244402 is an abundant number, since it is smaller than the sum of its proper divisors (43117064718).

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

31433244402 is a wasteful number, since it uses less digits than its factorization.

31433244402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208675.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 31433244402 its reverse (20444233413), we get a palindrome (51877477815).

The spelling of 31433244402 in words is "thirty-one billion, four hundred thirty-three million, two hundred forty-four thousand, four hundred two".