525525303421 has 2 divisors, whose sum is σ = 525525303422. Its totient is φ = 525525303420.

The previous prime is 525525303379. The next prime is 525525303469. The reversal of 525525303421 is 124303525525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396490605625 + 129034697796 = 629675^2 + 359214^2 .

It is a cyclic number.

It is not a de Polignac number, because 525525303421 - 2⁷ = 525525303293 is a prime.

It is a super-2 number, since 2×525525303421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525525303521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262762651710 + 262762651711.

It is an arithmetic number, because the mean of its divisors is an integer number (262762651711).

Almost surely, 2^525525303421 is an apocalyptic number.

It is an amenable number.

525525303421 is a deficient number, since it is larger than the sum of its proper divisors (1).

525525303421 is an equidigital number, since it uses as much as digits as its factorization.

525525303421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180000, while the sum is 37.

Adding to 525525303421 its reverse (124303525525), we get a palindrome (649828828946).

The spelling of 525525303421 in words is "five hundred twenty-five billion, five hundred twenty-five million, three hundred three thousand, four hundred twenty-one".