31212853 has 6 divisors (see below), whose sum is σ = 36308886. Its totient is φ = 26753832.

The previous prime is 31212827. The next prime is 31212887. The reversal of 31212853 is 35821213.

It can be written as a sum of positive squares in only one way, i.e., 30891364 + 321489 = 5558^2 + 567^2 .

It is not a de Polignac number, because 31212853 - 2⁹ = 31212341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 318450 + ... + 318547.

It is an arithmetic number, because the mean of its divisors is an integer number (6051481).

Almost surely, 2^31212853 is an apocalyptic number.

It is an amenable number.

31212853 is a deficient number, since it is larger than the sum of its proper divisors (5096033).

31212853 is an equidigital number, since it uses as much as digits as its factorization.

31212853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637011 (or 637004 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 31212853 is about 5586.8464271000. The cubic root of 31212853 is about 314.8554068892.

The spelling of 31212853 in words is "thirty-one million, two hundred twelve thousand, eight hundred fifty-three".