31332222420 has 48 divisors (see below), whose sum is σ = 91544584320. Its totient is φ = 7991986816.

The previous prime is 31332222409. The next prime is 31332222421. The reversal of 31332222420 is 2422223313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31332222421) 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 15 ways as a sum of consecutive naturals, for example, 11350875 + ... + 11353634.

It is an arithmetic number, because the mean of its divisors is an integer number (1907178840).

Almost surely, 2^31332222420 is an apocalyptic number.

31332222420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31332222420 is an abundant number, since it is smaller than the sum of its proper divisors (60212361900).

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

31332222420 is a wasteful number, since it uses less digits than its factorization.

31332222420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22704544 (or 22704542 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 31332222420 its reverse (2422223313), we get a palindrome (33754445733).

The spelling of 31332222420 in words is "thirty-one billion, three hundred thirty-two million, two hundred twenty-two thousand, four hundred twenty".