31432420233220 has 12 divisors (see below), whose sum is σ = 66008082489804. Its totient is φ = 12572968093280.

The previous prime is 31432420233163. The next prime is 31432420233251. The reversal of 31432420233220 is 2233202423413.

It can be written as a sum of positive squares in 2 ways, for example, as 4007675678724 + 27424744554496 = 2001918^2 + 5236864^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 785810505811 + ... + 785810505850.

It is an arithmetic number, because the mean of its divisors is an integer number (5500673540817).

Almost surely, 2^{31432420233220} is an apocalyptic number.

It is an amenable number.

31432420233220 is an abundant number, since it is smaller than the sum of its proper divisors (34575662256584).

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

31432420233220 is a wasteful number, since it uses less digits than its factorization.

31432420233220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571621011670 (or 1571621011668 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 31432420233220 its reverse (2233202423413), we get a palindrome (33665622656633).

The spelling of 31432420233220 in words is "thirty-one trillion, four hundred thirty-two billion, four hundred twenty million, two hundred thirty-three thousand, two hundred twenty".