31433231420 has 24 divisors (see below), whose sum is σ = 66077808048. Its totient is φ = 12560336000.

The previous prime is 31433231377. The next prime is 31433231461. The reversal of 31433231420 is 2413233413.

It is a self number, because there is not a number n which added to its sum of digits gives 31433231420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789881 + ... + 828720.

It is an arithmetic number, because the mean of its divisors is an integer number (2753242002).

Almost surely, 2^31433231420 is an apocalyptic number.

It is an amenable number.

31433231420 is an abundant number, since it is smaller than the sum of its proper divisors (34644576628).

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

31433231420 is a wasteful number, since it uses less digits than its factorization.

31433231420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619581 (or 1619579 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 31433231420 its reverse (2413233413), we get a palindrome (33846464833).

The spelling of 31433231420 in words is "thirty-one billion, four hundred thirty-three million, two hundred thirty-one thousand, four hundred twenty".