31223070000 has 350 divisors, whose sum is σ = 113365876932. Its totient is φ = 8324208000.

The previous prime is 31223069989. The next prime is 31223070019. The reversal of 31223070000 is 7032213.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 69 ways as a sum of consecutive naturals, for example, 7287859 + ... + 7292141.

Almost surely, 2^31223070000 is an apocalyptic number.

31223070000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31223070000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56682938466).

31223070000 is an abundant number, since it is smaller than the sum of its proper divisors (82142806932).

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

31223070000 is an frugal number, since it uses more digits than its factorization.

31223070000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329 (or 4293 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The spelling of 31223070000 in words is "thirty-one billion, two hundred twenty-three million, seventy thousand".