31233320428 has 6 divisors (see below), whose sum is σ = 54658310756. Its totient is φ = 15616660212.

The previous prime is 31233320407. The next prime is 31233320429. The reversal of 31233320428 is 82402333213.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31233320428.

It is not an unprimeable number, because it can be changed into a prime (31233320429) 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, 3904165050 + ... + 3904165057.

Almost surely, 2^31233320428 is an apocalyptic number.

It is an amenable number.

31233320428 is a deficient number, since it is larger than the sum of its proper divisors (23424990328).

31233320428 is a wasteful number, since it uses less digits than its factorization.

31233320428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7808330111 (or 7808330109 counting only the distinct ones).

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

The spelling of 31233320428 in words is "thirty-one billion, two hundred thirty-three million, three hundred twenty thousand, four hundred twenty-eight".