525213405509 has 16 divisors (see below), whose sum is σ = 568264878720. Its totient is φ = 482541917760.

The previous prime is 525213405469. The next prime is 525213405517. The reversal of 525213405509 is 905504312525.

It is a cyclic number.

It is not a de Polignac number, because 525213405509 - 2¹² = 525213401413 is a prime.

It is a super-2 number, since 2×525213405509² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525213405529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9937664 + ... + 9990374.

It is an arithmetic number, because the mean of its divisors is an integer number (35516554920).

Almost surely, 2^525213405509 is an apocalyptic number.

It is an amenable number.

525213405509 is a deficient number, since it is larger than the sum of its proper divisors (43051473211).

525213405509 is a wasteful number, since it uses less digits than its factorization.

525213405509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56300.

The product of its (nonzero) digits is 270000, while the sum is 41.

The spelling of 525213405509 in words is "five hundred twenty-five billion, two hundred thirteen million, four hundred five thousand, five hundred nine".