2031971 has 4 divisors (see below), whose sum is σ = 2065344. Its totient is φ = 1998600.

The previous prime is 2031961. The next prime is 2031977. The reversal of 2031971 is 1791302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1791302 = 2 ⋅895651.

It is a cyclic number.

It is not a de Polignac number, because 2031971 - 2⁶ = 2031907 is a prime.

It is a super-2 number, since 2×2031971² = 8257812289682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2031977) 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, 16595 + ... + 16716.

It is an arithmetic number, because the mean of its divisors is an integer number (516336).

2^2031971 is an apocalyptic number.

2031971 is a deficient number, since it is larger than the sum of its proper divisors (33373).

2031971 is an equidigital number, since it uses as much as digits as its factorization.

2031971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33372.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 2031971 is about 1425.4722024649. The cubic root of 2031971 is about 126.6599080728.

The spelling of 2031971 in words is "two million, thirty-one thousand, nine hundred seventy-one".