2539657213 has 2 divisors, whose sum is σ = 2539657214. Its totient is φ = 2539657212.

The previous prime is 2539657181. The next prime is 2539657231. The reversal of 2539657213 is 3127569352.

Together with next prime (2539657231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2228028804 + 311628409 = 47202^2 + 17653^2 .

It is a cyclic number.

It is not a de Polignac number, because 2539657213 - 2⁵ = 2539657181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2539657213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2539657283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269828606 + 1269828607.

It is an arithmetic number, because the mean of its divisors is an integer number (1269828607).

Almost surely, 2^2539657213 is an apocalyptic number.

It is an amenable number.

2539657213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2539657213 is an equidigital number, since it uses as much as digits as its factorization.

2539657213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 43.

The square root of 2539657213 is about 50395.0117868822. The cubic root of 2539657213 is about 1364.3476088301.

The spelling of 2539657213 in words is "two billion, five hundred thirty-nine million, six hundred fifty-seven thousand, two hundred thirteen".