31614971 has 4 divisors (see below), whose sum is σ = 31754472. Its totient is φ = 31475472.

The previous prime is 31614953. The next prime is 31615007. The reversal of 31614971 is 17941613.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31614971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31614941) 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 3 ways as a sum of consecutive naturals, for example, 69410 + ... + 69863.

It is an arithmetic number, because the mean of its divisors is an integer number (7938618).

Almost surely, 2^31614971 is an apocalyptic number.

31614971 is a deficient number, since it is larger than the sum of its proper divisors (139501).

31614971 is a wasteful number, since it uses less digits than its factorization.

31614971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139500.

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

The square root of 31614971 is about 5622.7191820328. The cubic root of 31614971 is about 316.2017452035.

The spelling of 31614971 in words is "thirty-one million, six hundred fourteen thousand, nine hundred seventy-one".