2531917 has 2 divisors, whose sum is σ = 2531918. Its totient is φ = 2531916.

The previous prime is 2531891. The next prime is 2531923. The reversal of 2531917 is 7191352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1705636 + 826281 = 1306^2 + 909^2 .

It is a cyclic number.

It is not a de Polignac number, because 2531917 - 2¹⁵ = 2499149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2531017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265958 + 1265959.

It is an arithmetic number, because the mean of its divisors is an integer number (1265959).

2^2531917 is an apocalyptic number.

It is an amenable number.

2531917 is a deficient number, since it is larger than the sum of its proper divisors (1).

2531917 is an equidigital number, since it uses as much as digits as its factorization.

2531917 is an evil number, because the sum of its binary digits is even.

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

The square root of 2531917 is about 1591.1998617396. The cubic root of 2531917 is about 136.2960139735.

The spelling of 2531917 in words is "two million, five hundred thirty-one thousand, nine hundred seventeen".