2531000291 has 2 divisors, whose sum is σ = 2531000292. Its totient is φ = 2531000290.

The previous prime is 2531000237. The next prime is 2531000321. The reversal of 2531000291 is 1920001352.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2531000291 is a prime.

It is not a weakly prime, because it can be changed into another prime (2531000221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265500145 + 1265500146.

It is an arithmetic number, because the mean of its divisors is an integer number (1265500146).

Almost surely, 2^2531000291 is an apocalyptic number.

2531000291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2531000291 is an equidigital number, since it uses as much as digits as its factorization.

2531000291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 2531000291 is about 50309.0478045451. The cubic root of 2531000291 is about 1362.7956282006.

The spelling of 2531000291 in words is "two billion, five hundred thirty-one million, two hundred ninety-one", and thus it is an aban number.