31220441421432 has 32 divisors (see below), whose sum is σ = 81444629796480. Its totient is φ = 9954343641440.

The previous prime is 31220441421397. The next prime is 31220441421439. The reversal of 31220441421432 is 23412414402213.

It is a junction number, because it is equal to n+sod(n) for n = 31220441421393 and 31220441421402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220441421439) 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, 28279384794 + ... + 28279385897.

It is an arithmetic number, because the mean of its divisors is an integer number (2545144681140).

Almost surely, 2^{31220441421432} is an apocalyptic number.

It is an amenable number.

31220441421432 is an abundant number, since it is smaller than the sum of its proper divisors (50224188375048).

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

31220441421432 is a wasteful number, since it uses less digits than its factorization.

31220441421432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56558770723 (or 56558770719 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 33.

Adding to 31220441421432 its reverse (23412414402213), we get a palindrome (54632855823645).

The spelling of 31220441421432 in words is "thirty-one trillion, two hundred twenty billion, four hundred forty-one million, four hundred twenty-one thousand, four hundred thirty-two".