31671914 has 4 divisors (see below), whose sum is σ = 47507874. Its totient is φ = 15835956.

The previous prime is 31671869. The next prime is 31671947. The reversal of 31671914 is 41917613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41917613 = 281 ⋅149173.

It can be written as a sum of positive squares in only one way, i.e., 21780889 + 9891025 = 4667^2 + 3145^2 .

It is a super-2 number, since 2×31671914² = 2006220272846792, which contains 22 as substring.

It is an unprimeable number.

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, 7917977 + ... + 7917980.

Almost surely, 2^31671914 is an apocalyptic number.

31671914 is a deficient number, since it is larger than the sum of its proper divisors (15835960).

31671914 is a wasteful number, since it uses less digits than its factorization.

31671914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15835959.

The product of its digits is 4536, while the sum is 32.

The square root of 31671914 is about 5627.7805572001. The cubic root of 31671914 is about 316.3914725814.

The spelling of 31671914 in words is "thirty-one million, six hundred seventy-one thousand, nine hundred fourteen".