31443421132 has 24 divisors (see below), whose sum is σ = 55624590000. Its totient is φ = 15551241216.

The previous prime is 31443421123. The next prime is 31443421133. The reversal of 31443421132 is 23112434413.

It is a happy number.

It is a super-2 number, since 2×31443421132² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31443421132.

It is not an unprimeable number, because it can be changed into a prime (31443421133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155844 + ... + 295252.

It is an arithmetic number, because the mean of its divisors is an integer number (2317691250).

Almost surely, 2^31443421132 is an apocalyptic number.

It is an amenable number.

31443421132 is a deficient number, since it is larger than the sum of its proper divisors (24181168868).

31443421132 is a wasteful number, since it uses less digits than its factorization.

31443421132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140025 (or 140023 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

Adding to 31443421132 its reverse (23112434413), we get a palindrome (54555855545).

The spelling of 31443421132 in words is "thirty-one billion, four hundred forty-three million, four hundred twenty-one thousand, one hundred thirty-two".