31712066 has 4 divisors (see below), whose sum is σ = 47568102. Its totient is φ = 15856032.

The previous prime is 31712053. The next prime is 31712069. The reversal of 31712066 is 66021713.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 31192225 + 519841 = 5585^2 + 721^2 .

It is not an unprimeable number, because it can be changed into a prime (31712069) 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 as a sum of consecutive naturals, namely, 7928015 + ... + 7928018.

Almost surely, 2^31712066 is an apocalyptic number.

31712066 is a deficient number, since it is larger than the sum of its proper divisors (15856036).

31712066 is a wasteful number, since it uses less digits than its factorization.

31712066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15856035.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 31712066 is about 5631.3467305788. The cubic root of 31712066 is about 316.5251176547.

Adding to 31712066 its reverse (66021713), we get a palindrome (97733779).

The spelling of 31712066 in words is "thirty-one million, seven hundred twelve thousand, sixty-six".