31242424212 has 18 divisors (see below), whose sum is σ = 78973905738. Its totient is φ = 10414141392.

The previous prime is 31242424207. The next prime is 31242424231. The reversal of 31242424212 is 21242424213.

It is a happy number.

31242424212 is a `hidden beast` number, since 3 + 1 + 2 + 424 + 24 + 212 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21329434116 + 9912990096 = 146046^2 + 99564^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 433922523 + ... + 433922594.

Almost surely, 2^31242424212 is an apocalyptic number.

It is an amenable number.

31242424212 is an abundant number, since it is smaller than the sum of its proper divisors (47731481526).

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

31242424212 is a wasteful number, since it uses less digits than its factorization.

31242424212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867845127 (or 867845122 counting only the distinct ones).

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

Adding to 31242424212 its reverse (21242424213), we get a palindrome (52484848425).

Subtracting from 31242424212 its reverse (21242424213), we obtain a palindrome (9999999999).

The spelling of 31242424212 in words is "thirty-one billion, two hundred forty-two million, four hundred twenty-four thousand, two hundred twelve".