31242244212 has 48 divisors (see below), whose sum is σ = 84520087680. Its totient is φ = 9961294464.

The previous prime is 31242244147. The next prime is 31242244213. The reversal of 31242244212 is 21244224213.

It is a happy number.

31242244212 is a `hidden beast` number, since 3 + 12 + 4 + 224 + 421 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31242244213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6286213 + ... + 6291180.

It is an arithmetic number, because the mean of its divisors is an integer number (1760835160).

Almost surely, 2^31242244212 is an apocalyptic number.

It is an amenable number.

31242244212 is an abundant number, since it is smaller than the sum of its proper divisors (53277843468).

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

31242244212 is a wasteful number, since it uses less digits than its factorization.

31242244212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12577429 (or 12577421 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

Adding to 31242244212 its reverse (21244224213), we get a palindrome (52486468425).

The spelling of 31242244212 in words is "thirty-one billion, two hundred forty-two million, two hundred forty-four thousand, two hundred twelve".