521025550410401 has 2 divisors, whose sum is σ = 521025550410402. Its totient is φ = 521025550410400.

The previous prime is 521025550410371. The next prime is 521025550410439. The reversal of 521025550410401 is 104014055520125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423336838672801 + 97688711737600 = 20575151^2 + 9883760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521025550410401 is a prime.

It is a super-2 number, since 2×521025550410401² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (521021550410401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260512775205200 + 260512775205201.

It is an arithmetic number, because the mean of its divisors is an integer number (260512775205201).

Almost surely, 2^{521025550410401} is an apocalyptic number.

It is an amenable number.

521025550410401 is a deficient number, since it is larger than the sum of its proper divisors (1).

521025550410401 is an equidigital number, since it uses as much as digits as its factorization.

521025550410401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40000, while the sum is 35.

The spelling of 521025550410401 in words is "five hundred twenty-one trillion, twenty-five billion, five hundred fifty million, four hundred ten thousand, four hundred one".