31226223928 has 8 divisors (see below), whose sum is σ = 58549169880. Its totient is φ = 15613111960.

The previous prime is 31226223923. The next prime is 31226223997. The reversal of 31226223928 is 82932262213.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31226223923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1951638988 + ... + 1951639003.

It is an arithmetic number, because the mean of its divisors is an integer number (7318646235).

Almost surely, 2^31226223928 is an apocalyptic number.

It is an amenable number.

31226223928 is a deficient number, since it is larger than the sum of its proper divisors (27322945952).

31226223928 is a wasteful number, since it uses less digits than its factorization.

31226223928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903277997 (or 3903277993 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The spelling of 31226223928 in words is "thirty-one billion, two hundred twenty-six million, two hundred twenty-three thousand, nine hundred twenty-eight".