521252022401 has 16 divisors (see below), whose sum is σ = 602594294400. Its totient is φ = 446366121600.

The previous prime is 521252022371. The next prime is 521252022443. The reversal of 521252022401 is 104220252125.

It is a cyclic number.

It is not a de Polignac number, because 521252022401 - 2⁶ = 521252022337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (521252022491) 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 15 ways as a sum of consecutive naturals, for example, 19913981 + ... + 19940138.

It is an arithmetic number, because the mean of its divisors is an integer number (37662143400).

Almost surely, 2^521252022401 is an apocalyptic number.

It is an amenable number.

521252022401 is a deficient number, since it is larger than the sum of its proper divisors (81342271999).

521252022401 is a wasteful number, since it uses less digits than its factorization.

521252022401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39854200.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 521252022401 its reverse (104220252125), we get a palindrome (625472274526).

The spelling of 521252022401 in words is "five hundred twenty-one billion, two hundred fifty-two million, twenty-two thousand, four hundred one".