521253545401 has 8 divisors (see below), whose sum is σ = 534534422400. Its totient is φ = 508137648480.

The previous prime is 521253545381. The next prime is 521253545411. The reversal of 521253545401 is 104545352125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521253545401 - 2¹¹ = 521253543353 is a prime.

It is a super-2 number, since 2×521253545401² (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 (521253545411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41238621 + ... + 41251258.

It is an arithmetic number, because the mean of its divisors is an integer number (66816802800).

Almost surely, 2^521253545401 is an apocalyptic number.

It is an amenable number.

521253545401 is a deficient number, since it is larger than the sum of its proper divisors (13280876999).

521253545401 is an equidigital number, since it uses as much as digits as its factorization.

521253545401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82490039.

The product of its (nonzero) digits is 120000, while the sum is 37.

Adding to 521253545401 its reverse (104545352125), we get a palindrome (625798897526).

The spelling of 521253545401 in words is "five hundred twenty-one billion, two hundred fifty-three million, five hundred forty-five thousand, four hundred one".