2520643399 has 2 divisors, whose sum is σ = 2520643400. Its totient is φ = 2520643398.

The previous prime is 2520643369. The next prime is 2520643429. The reversal of 2520643399 is 9933460252.

It is a balanced prime because it is at equal distance from previous prime (2520643369) and next prime (2520643429).

It is a cyclic number.

It is not a de Polignac number, because 2520643399 - 2²³ = 2512254791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2520643369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260321699 + 1260321700.

It is an arithmetic number, because the mean of its divisors is an integer number (1260321700).

Almost surely, 2^2520643399 is an apocalyptic number.

2520643399 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520643399 is an equidigital number, since it uses as much as digits as its factorization.

2520643399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 43.

The square root of 2520643399 is about 50206.0095904863. The cubic root of 2520643399 is about 1360.9342267236.

The spelling of 2520643399 in words is "two billion, five hundred twenty million, six hundred forty-three thousand, three hundred ninety-nine".