31300212 has 12 divisors (see below), whose sum is σ = 73033856. Its totient is φ = 10433400.

The previous prime is 31300207. The next prime is 31300219. The reversal of 31300212 is 21200313.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 2608351 = 31300212 / (3 + 1 + 3 + 0 + 0 + 2 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31300219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1304164 + ... + 1304187.

Almost surely, 2^31300212 is an apocalyptic number.

It is an amenable number.

31300212 is an abundant number, since it is smaller than the sum of its proper divisors (41733644).

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

31300212 is a wasteful number, since it uses less digits than its factorization.

31300212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2608358 (or 2608356 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 31300212 is about 5594.6592389528. The cubic root of 31300212 is about 315.1488739472.

Adding to 31300212 its reverse (21200313), we get a palindrome (52500525).

The spelling of 31300212 in words is "thirty-one million, three hundred thousand, two hundred twelve".