3131971 has 4 divisors (see below), whose sum is σ = 3240000. Its totient is φ = 3023944.

The previous prime is 3131951. The next prime is 3131977. The reversal of 3131971 is 1791313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1791313 = 151 ⋅11863.

It is a cyclic number.

It is not a de Polignac number, because 3131971 - 2¹¹ = 3129923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3131977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53971 + ... + 54028.

It is an arithmetic number, because the mean of its divisors is an integer number (810000).

Almost surely, 2^3131971 is an apocalyptic number.

3131971 is a deficient number, since it is larger than the sum of its proper divisors (108029).

3131971 is a wasteful number, since it uses less digits than its factorization.

3131971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108028.

The product of its digits is 567, while the sum is 25.

The square root of 3131971 is about 1769.7375511640. The cubic root of 3131971 is about 146.3095172568.

The spelling of 3131971 in words is "three million, one hundred thirty-one thousand, nine hundred seventy-one".