31430330442 has 192 divisors, whose sum is σ = 85560883200. Its totient is φ = 8135406720.

The previous prime is 31430330401. The next prime is 31430330443. The reversal of 31430330442 is 24403303413.

31430330442 is a `hidden beast` number, since 3 + 14 + 303 + 304 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (31430330443) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7426467 + ... + 7430697.

It is an arithmetic number, because the mean of its divisors is an integer number (445629600).

Almost surely, 2^31430330442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31430330442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42780441600).

31430330442 is an abundant number, since it is smaller than the sum of its proper divisors (54130552758).

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

31430330442 is a wasteful number, since it uses less digits than its factorization.

31430330442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4401 (or 4398 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 31430330442 its reverse (24403303413), we get a palindrome (55833633855).

The spelling of 31430330442 in words is "thirty-one billion, four hundred thirty million, three hundred thirty thousand, four hundred forty-two".