31422012 has 12 divisors (see below), whose sum is σ = 73318056. Its totient is φ = 10474000.

The previous prime is 31422011. The next prime is 31422019. The reversal of 31422012 is 21022413.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 31421982 and 31422000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31422011) 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 3 ways as a sum of consecutive naturals, for example, 1309239 + ... + 1309262.

It is an arithmetic number, because the mean of its divisors is an integer number (6109838).

Almost surely, 2^31422012 is an apocalyptic number.

It is an amenable number.

31422012 is an abundant number, since it is smaller than the sum of its proper divisors (41896044).

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

31422012 is a wasteful number, since it uses less digits than its factorization.

31422012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618508 (or 2618506 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 31422012 is about 5605.5340512747. The cubic root of 31422012 is about 315.5571294381.

Adding to 31422012 its reverse (21022413), we get a palindrome (52444425).

The spelling of 31422012 in words is "thirty-one million, four hundred twenty-two thousand, twelve".