31420212 has 24 divisors (see below), whose sum is σ = 73495296. Its totient is φ = 10447488.

The previous prime is 31420189. The next prime is 31420217. The reversal of 31420212 is 21202413.

It is a junction number, because it is equal to n+sod(n) for n = 31420191 and 31420200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31420217) 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 7 ways as a sum of consecutive naturals, for example, 2173 + ... + 8219.

It is an arithmetic number, because the mean of its divisors is an integer number (3062304).

Almost surely, 2^31420212 is an apocalyptic number.

It is an amenable number.

31420212 is an abundant number, since it is smaller than the sum of its proper divisors (42075084).

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

31420212 is a wasteful number, since it uses less digits than its factorization.

31420212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6487 (or 6485 counting only the distinct ones).

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

The square root of 31420212 is about 5605.3734933544. The cubic root of 31420212 is about 315.5511037930.

Adding to 31420212 its reverse (21202413), we get a palindrome (52622625).

The spelling of 31420212 in words is "thirty-one million, four hundred twenty thousand, two hundred twelve".