525311055161 has 4 divisors (see below), whose sum is σ = 525383649252. Its totient is φ = 525238461072.

The previous prime is 525311055109. The next prime is 525311055173. The reversal of 525311055161 is 161550113525.

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 384175592761 + 141135462400 = 619819^2 + 375680^2 .

It is a cyclic number.

It is not a de Polignac number, because 525311055161 - 2⁶ = 525311055097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525311055361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36286190 + ... + 36300663.

It is an arithmetic number, because the mean of its divisors is an integer number (131345912313).

Almost surely, 2^525311055161 is an apocalyptic number.

It is an amenable number.

525311055161 is a deficient number, since it is larger than the sum of its proper divisors (72594091).

525311055161 is an equidigital number, since it uses as much as digits as its factorization.

525311055161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72594090.

The product of its (nonzero) digits is 22500, while the sum is 35.

Adding to 525311055161 its reverse (161550113525), we get a palindrome (686861168686).

The spelling of 525311055161 in words is "five hundred twenty-five billion, three hundred eleven million, fifty-five thousand, one hundred sixty-one".