31435430442 has 32 divisors (see below), whose sum is σ = 67713938880. Its totient is φ = 9671460480.

The previous prime is 31435430401. The next prime is 31435430447. The reversal of 31435430442 is 24403453413.

It is not an unprimeable number, because it can be changed into a prime (31435430447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1292817 + ... + 1316907.

It is an arithmetic number, because the mean of its divisors is an integer number (2116060590).

Almost surely, 2^31435430442 is an apocalyptic number.

31435430442 is an abundant number, since it is smaller than the sum of its proper divisors (36278508438).

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

31435430442 is a wasteful number, since it uses less digits than its factorization.

31435430442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40838.

The product of its (nonzero) digits is 69120, while the sum is 33.

Adding to 31435430442 its reverse (24403453413), we get a palindrome (55838883855).

The spelling of 31435430442 in words is "thirty-one billion, four hundred thirty-five million, four hundred thirty thousand, four hundred forty-two".