425522509 has 2 divisors, whose sum is σ = 425522510. Its totient is φ = 425522508.

The previous prime is 425522497. The next prime is 425522549. The reversal of 425522509 is 905225524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 424566025 + 956484 = 20605^2 + 978^2 .

It is a cyclic number.

It is not a de Polignac number, because 425522509 - 2⁷ = 425522381 is a prime.

It is a super-4 number, since 4×425522509⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425522549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212761254 + 212761255.

It is an arithmetic number, because the mean of its divisors is an integer number (212761255).

Almost surely, 2^425522509 is an apocalyptic number.

It is an amenable number.

425522509 is a deficient number, since it is larger than the sum of its proper divisors (1).

425522509 is an equidigital number, since it uses as much as digits as its factorization.

425522509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 425522509 is about 20628.1969401109. The cubic root of 425522509 is about 752.1552871980.

The spelling of 425522509 in words is "four hundred twenty-five million, five hundred twenty-two thousand, five hundred nine".