31431312430 has 16 divisors (see below), whose sum is σ = 64658700000. Its totient is φ = 10776449952.

The previous prime is 31431312389. The next prime is 31431312433. The reversal of 31431312430 is 3421313413.

It is a junction number, because it is equal to n+sod(n) for n = 31431312395 and 31431312404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31431312433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224509305 + ... + 224509444.

It is an arithmetic number, because the mean of its divisors is an integer number (4041168750).

Almost surely, 2^31431312430 is an apocalyptic number.

31431312430 is an abundant number, since it is smaller than the sum of its proper divisors (33227387570).

31431312430 is a wasteful number, since it uses less digits than its factorization.

31431312430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449018763.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31431312430 its reverse (3421313413), we get a palindrome (34852625843).

The spelling of 31431312430 in words is "thirty-one billion, four hundred thirty-one million, three hundred twelve thousand, four hundred thirty".