525443323001421 has 128 divisors (see below), whose sum is σ = 821848858951680. Its totient is φ = 295427372979200.

The previous prime is 525443323001371. The next prime is 525443323001473. The reversal of 525443323001421 is 124100323344525.

It is a happy number.

It is not a de Polignac number, because 525443323001421 - 2⁷ = 525443323001293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 525443323001421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525443323001321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 28052060626 + ... + 28052079356.

It is an arithmetic number, because the mean of its divisors is an integer number (6420694210560).

Almost surely, 2^{525443323001421} is an apocalyptic number.

It is an amenable number.

525443323001421 is a deficient number, since it is larger than the sum of its proper divisors (296405535950259).

525443323001421 is a wasteful number, since it uses less digits than its factorization.

525443323001421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25887.

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 525443323001421 its reverse (124100323344525), we get a palindrome (649543646345946).

The spelling of 525443323001421 in words is "five hundred twenty-five trillion, four hundred forty-three billion, three hundred twenty-three million, one thousand, four hundred twenty-one".