31423142236 has 6 divisors (see below), whose sum is σ = 54990498920. Its totient is φ = 15711571116.

The previous prime is 31423142213. The next prime is 31423142237. The reversal of 31423142236 is 63224132413.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31423142198 and 31423142207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31423142237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3927892776 + ... + 3927892783.

Almost surely, 2^31423142236 is an apocalyptic number.

It is an amenable number.

31423142236 is a deficient number, since it is larger than the sum of its proper divisors (23567356684).

31423142236 is a wasteful number, since it uses less digits than its factorization.

31423142236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7855785563 (or 7855785561 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

Adding to 31423142236 its reverse (63224132413), we get a palindrome (94647274649).

The spelling of 31423142236 in words is "thirty-one billion, four hundred twenty-three million, one hundred forty-two thousand, two hundred thirty-six".