31283021088 has 72 divisors (see below), whose sum is σ = 97048472976. Its totient is φ = 9479702400.

The previous prime is 31283021083. The next prime is 31283021129. The reversal of 31283021088 is 88012038213.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (31283021083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4934178 + ... + 4940513.

It is an arithmetic number, because the mean of its divisors is an integer number (1347895458).

Almost surely, 2^31283021088 is an apocalyptic number.

It is an amenable number.

31283021088 is an abundant number, since it is smaller than the sum of its proper divisors (65765451888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31283021088 is a wasteful number, since it uses less digits than its factorization.

31283021088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9874718 (or 9874707 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The spelling of 31283021088 in words is "thirty-one billion, two hundred eighty-three million, twenty-one thousand, eighty-eight".