31242413220 has 48 divisors (see below), whose sum is σ = 87538960320. Its totient is φ = 8325576576.

The previous prime is 31242413201. The next prime is 31242413227. The reversal of 31242413220 is 2231424213.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31242413227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90907 + ... + 265986.

It is an arithmetic number, because the mean of its divisors is an integer number (1823728340).

Almost surely, 2^31242413220 is an apocalyptic number.

31242413220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31242413220 is an abundant number, since it is smaller than the sum of its proper divisors (56296547100).

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

31242413220 is a wasteful number, since it uses less digits than its factorization.

31242413220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358364 (or 358362 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31242413220 its reverse (2231424213), we get a palindrome (33473837433).

The spelling of 31242413220 in words is "thirty-one billion, two hundred forty-two million, four hundred thirteen thousand, two hundred twenty".