525204511121 has 4 divisors (see below), whose sum is σ = 527925778212. Its totient is φ = 522483244032.

The previous prime is 525204511103. The next prime is 525204511127. The reversal of 525204511121 is 121115402525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 178476676225 + 346727834896 = 422465^2 + 588836^2 .

It is a cyclic number.

It is not a de Polignac number, because 525204511121 - 2¹⁰ = 525204510097 is a prime.

It is a super-2 number, since 2×525204511121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525204511127) 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 3 ways as a sum of consecutive naturals, for example, 1360633256 + ... + 1360633641.

It is an arithmetic number, because the mean of its divisors is an integer number (131981444553).

Almost surely, 2^525204511121 is an apocalyptic number.

It is an amenable number.

525204511121 is a deficient number, since it is larger than the sum of its proper divisors (2721267091).

525204511121 is a wasteful number, since it uses less digits than its factorization.

525204511121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721267090.

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 525204511121 its reverse (121115402525), we get a palindrome (646319913646).

The spelling of 525204511121 in words is "five hundred twenty-five billion, two hundred four million, five hundred eleven thousand, one hundred twenty-one".