2531000321 has 2 divisors, whose sum is σ = 2531000322. Its totient is φ = 2531000320.

The previous prime is 2531000291. The next prime is 2531000323. The reversal of 2531000321 is 1230001352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2312551921 + 218448400 = 48089^2 + 14780^2 .

It is a cyclic number.

It is not a de Polignac number, because 2531000321 - 2¹⁰ = 2530999297 is a prime.

Together with 2531000323, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2531000321.

It is not a weakly prime, because it can be changed into another prime (2531000323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265500160 + 1265500161.

It is an arithmetic number, because the mean of its divisors is an integer number (1265500161).

It is a Proth number, since it is equal to 9655 ⋅ 2¹⁸ + 1 and 9655 < 2¹⁸.

Almost surely, 2^2531000321 is an apocalyptic number.

It is an amenable number.

2531000321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2531000321 is an equidigital number, since it uses as much as digits as its factorization.

2531000321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 2531000321 is about 50309.0481027022. The cubic root of 2531000321 is about 1362.7956335850.

Adding to 2531000321 its reverse (1230001352), we get a palindrome (3761001673).

The spelling of 2531000321 in words is "two billion, five hundred thirty-one million, three hundred twenty-one", and thus it is an aban number.