31423443404 has 6 divisors (see below), whose sum is σ = 54991025964. Its totient is φ = 15711721700.

The previous prime is 31423443391. The next prime is 31423443407. The reversal of 31423443404 is 40434432413.

It is a super-2 number, since 2×31423443404² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31423443407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3927930422 + ... + 3927930429.

It is an arithmetic number, because the mean of its divisors is an integer number (9165170994).

Almost surely, 2^31423443404 is an apocalyptic number.

It is an amenable number.

31423443404 is a deficient number, since it is larger than the sum of its proper divisors (23567582560).

31423443404 is a wasteful number, since it uses less digits than its factorization.

31423443404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7855860855 (or 7855860853 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 31423443404 its reverse (40434432413), we get a palindrome (71857875817).

The spelling of 31423443404 in words is "thirty-one billion, four hundred twenty-three million, four hundred forty-three thousand, four hundred four".