31434432442221 has 8 divisors (see below), whose sum is σ = 41920086480544. Its totient is φ = 20952533349360.

The previous prime is 31434432442181. The next prime is 31434432442223. The reversal of 31434432442221 is 12224423443413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31434432442221 - 2⁷ = 31434432442093 is a prime.

It is a super-2 number, since 2×31434432442221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31434432442221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31434432442223) 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, 938716831 + ... + 938750316.

It is an arithmetic number, because the mean of its divisors is an integer number (5240010810068).

Almost surely, 2^{31434432442221} is an apocalyptic number.

It is an amenable number.

31434432442221 is a deficient number, since it is larger than the sum of its proper divisors (10485654038323).

31434432442221 is a wasteful number, since it uses less digits than its factorization.

31434432442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877472731.

The product of its digits is 442368, while the sum is 39.

Adding to 31434432442221 its reverse (12224423443413), we get a palindrome (43658855885634).

The spelling of 31434432442221 in words is "thirty-one trillion, four hundred thirty-four billion, four hundred thirty-two million, four hundred forty-two thousand, two hundred twenty-one".