2531971 has 4 divisors (see below), whose sum is σ = 2726752. Its totient is φ = 2337192.

The previous prime is 2531951. The next prime is 2531981. The reversal of 2531971 is 1791352.

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

It is not a de Polignac number, because 2531971 - 2¹³ = 2523779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2531951) 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, 97371 + ... + 97396.

It is an arithmetic number, because the mean of its divisors is an integer number (681688).

2^2531971 is an apocalyptic number.

2531971 is a deficient number, since it is larger than the sum of its proper divisors (194781).

2531971 is a wasteful number, since it uses less digits than its factorization.

2531971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194780.

The product of its digits is 1890, while the sum is 28.

The square root of 2531971 is about 1591.2168299764. The cubic root of 2531971 is about 136.2969829273.

The spelling of 2531971 in words is "two million, five hundred thirty-one thousand, nine hundred seventy-one".