31442143433 has 8 divisors (see below), whose sum is σ = 33460678152. Its totient is φ = 29442386176.

The previous prime is 31442143429. The next prime is 31442143459. The reversal of 31442143433 is 33434124413.

It can be written as a sum of positive squares in 4 ways, for example, as 22286906944 + 9155236489 = 149288^2 + 95683^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 31442143433 - 2² = 31442143429 is a prime.

It is a super-2 number, since 2×31442143433² (a number of 22 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 31442143433.

It is not an unprimeable number, because it can be changed into a prime (31442143633) 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, 4690910 + ... + 4697607.

It is an arithmetic number, because the mean of its divisors is an integer number (4182584769).

Almost surely, 2^31442143433 is an apocalyptic number.

It is an amenable number.

31442143433 is a deficient number, since it is larger than the sum of its proper divisors (2018534719).

31442143433 is a wasteful number, since it uses less digits than its factorization.

31442143433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9388731.

The product of its digits is 41472, while the sum is 32.

Adding to 31442143433 its reverse (33434124413), we get a palindrome (64876267846).

The spelling of 31442143433 in words is "thirty-one billion, four hundred forty-two million, one hundred forty-three thousand, four hundred thirty-three".