1565422913 has 2 divisors, whose sum is σ = 1565422914. Its totient is φ = 1565422912.

The previous prime is 1565422891. The next prime is 1565422919. The reversal of 1565422913 is 3192245651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1135150864 + 430272049 = 33692^2 + 20743^2 .

It is a cyclic number.

It is not a de Polignac number, because 1565422913 - 2⁸ = 1565422657 is a prime.

It is not a weakly prime, because it can be changed into another prime (1565422919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782711456 + 782711457.

It is an arithmetic number, because the mean of its divisors is an integer number (782711457).

Almost surely, 2^1565422913 is an apocalyptic number.

It is an amenable number.

1565422913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1565422913 is an equidigital number, since it uses as much as digits as its factorization.

1565422913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 1565422913 is about 39565.4257275212. The cubic root of 1565422913 is about 1161.1203289035.

The spelling of 1565422913 in words is "one billion, five hundred sixty-five million, four hundred twenty-two thousand, nine hundred thirteen".