31300221 has 8 divisors (see below), whose sum is σ = 41782720. Its totient is φ = 20842272.

The previous prime is 31300219. The next prime is 31300231. The reversal of 31300221 is 12200313.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31300221 - 2¹ = 31300219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31300197 and 31300206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31300231) 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, 2920 + ... + 8433.

It is an arithmetic number, because the mean of its divisors is an integer number (5222840).

Almost surely, 2^31300221 is an apocalyptic number.

It is an amenable number.

31300221 is a deficient number, since it is larger than the sum of its proper divisors (10482499).

31300221 is a wasteful number, since it uses less digits than its factorization.

31300221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12275.

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

The square root of 31300221 is about 5594.6600432913. The cubic root of 31300221 is about 315.1489041530.

Adding to 31300221 its reverse (12200313), we get a palindrome (43500534).

The spelling of 31300221 in words is "thirty-one million, three hundred thousand, two hundred twenty-one".