31202230000 has 100 divisors (see below), whose sum is σ = 77387265648. Its totient is φ = 12176320000.

The previous prime is 31202229979. The next prime is 31202230001. The reversal of 31202230000 is 3220213.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31202230001) 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 in 19 ways as a sum of consecutive naturals, for example, 371949 + ... + 448051.

Almost surely, 2^31202230000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31202230000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38693632824).

31202230000 is an abundant number, since it is smaller than the sum of its proper divisors (46185035648).

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

31202230000 is an equidigital number, since it uses as much as digits as its factorization.

31202230000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76172 (or 76151 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 31202230000 its reverse (3220213), we get a palindrome (31205450213).

The spelling of 31202230000 in words is "thirty-one billion, two hundred two million, two hundred thirty thousand".