525475013509 has 2 divisors, whose sum is σ = 525475013510. Its totient is φ = 525475013508.

The previous prime is 525475013431. The next prime is 525475013533. The reversal of 525475013509 is 905310574525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 302428504225 + 223046509284 = 549935^2 + 472278^2 .

It is a cyclic number.

It is not a de Polignac number, because 525475013509 - 2¹¹ = 525475011461 is a prime.

It is a super-2 number, since 2×525475013509² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525475013599) 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, 262737506754 + 262737506755.

It is an arithmetic number, because the mean of its divisors is an integer number (262737506755).

Almost surely, 2^525475013509 is an apocalyptic number.

It is an amenable number.

525475013509 is a deficient number, since it is larger than the sum of its proper divisors (1).

525475013509 is an equidigital number, since it uses as much as digits as its factorization.

525475013509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 945000, while the sum is 46.

The spelling of 525475013509 in words is "five hundred twenty-five billion, four hundred seventy-five million, thirteen thousand, five hundred nine".