31133332230 has 256 divisors, whose sum is σ = 100590336000. Its totient is φ = 5955747840.

The previous prime is 31133332201. The next prime is 31133332253. The reversal of 31133332230 is 3223333113.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31133332230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13482316 + ... + 13484624.

It is an arithmetic number, because the mean of its divisors is an integer number (392931000).

Almost surely, 2^31133332230 is an apocalyptic number.

31133332230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31133332230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50295168000).

31133332230 is an abundant number, since it is smaller than the sum of its proper divisors (69457003770).

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

31133332230 is a wasteful number, since it uses less digits than its factorization.

31133332230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2799.

The product of its (nonzero) digits is 2916, while the sum is 24.

Adding to 31133332230 its reverse (3223333113), we get a palindrome (34356665343).

It can be divided in two parts, 31133 and 332230, that added together give a palindrome (363363).

The spelling of 31133332230 in words is "thirty-one billion, one hundred thirty-three million, three hundred thirty-two thousand, two hundred thirty".