521518095 has 96 divisors (see below), whose sum is σ = 1134701568. Its totient is φ = 224322048.

The previous prime is 521518093. The next prime is 521518117. The reversal of 521518095 is 590815125.

It is a happy number.

521518095 is a `hidden beast` number, since 52 + 1 + 518 + 0 + 95 = 666.

It is not a de Polignac number, because 521518095 - 2¹ = 521518093 is a prime.

It is a super-2 number, since 2×521518095² = 543962246824858050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521518093) 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 in 95 ways as a sum of consecutive naturals, for example, 142782 + ... + 146388.

It is an arithmetic number, because the mean of its divisors is an integer number (11819808).

Almost surely, 2^521518095 is an apocalyptic number.

521518095 is an abundant number, since it is smaller than the sum of its proper divisors (613183473).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521518095 is a wasteful number, since it uses less digits than its factorization.

521518095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3651 (or 3639 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The square root of 521518095 is about 22836.7706780096. The cubic root of 521518095 is about 804.9269354876.

The spelling of 521518095 in words is "five hundred twenty-one million, five hundred eighteen thousand, ninety-five".