2071931 has 4 divisors (see below), whose sum is σ = 2181000. Its totient is φ = 1962864.

The previous prime is 2071921. The next prime is 2071939. The reversal of 2071931 is 1391702.

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

It is a cyclic number.

It is not a de Polignac number, because 2071931 - 2¹⁰ = 2070907 is a prime.

It is a super-2 number, since 2×2071931² = 8585796137522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2071897 and 2071906.

It is not an unprimeable number, because it can be changed into a prime (2071939) 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, 54506 + ... + 54543.

It is an arithmetic number, because the mean of its divisors is an integer number (545250).

2^2071931 is an apocalyptic number.

2071931 is a deficient number, since it is larger than the sum of its proper divisors (109069).

2071931 is a wasteful number, since it uses less digits than its factorization.

2071931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109068.

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

The square root of 2071931 is about 1439.4203694543. The cubic root of 2071931 is about 127.4848065966.

The spelling of 2071931 in words is "two million, seventy-one thousand, nine hundred thirty-one".