31714221 has 36 divisors (see below), whose sum is σ = 54098016. Its totient is φ = 16465680.

The previous prime is 31714201. The next prime is 31714229. The reversal of 31714221 is 12241713.

It is not a de Polignac number, because 31714221 - 2¹¹ = 31712173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31714229) 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 35 ways as a sum of consecutive naturals, for example, 16896 + ... + 18678.

Almost surely, 2^31714221 is an apocalyptic number.

It is an amenable number.

31714221 is a deficient number, since it is larger than the sum of its proper divisors (22383795).

31714221 is a wasteful number, since it uses less digits than its factorization.

31714221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822 (or 1804 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 31714221 is about 5631.5380669938. The cubic root of 31714221 is about 316.5322873355.

Adding to 31714221 its reverse (12241713), we get a palindrome (43955934).

The spelling of 31714221 in words is "thirty-one million, seven hundred fourteen thousand, two hundred twenty-one".