521925036901 has 2 divisors, whose sum is σ = 521925036902. Its totient is φ = 521925036900.

The previous prime is 521925036883. The next prime is 521925036911. The reversal of 521925036901 is 109630529125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331314208801 + 190610828100 = 575599^2 + 436590^2 .

It is a cyclic number.

It is not a de Polignac number, because 521925036901 - 2²³ = 521916648293 is a prime.

It is a super-2 number, since 2×521925036901² (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 (521925036911) 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 as a sum of consecutive naturals, namely, 260962518450 + 260962518451.

It is an arithmetic number, because the mean of its divisors is an integer number (260962518451).

Almost surely, 2^521925036901 is an apocalyptic number.

It is an amenable number.

521925036901 is a deficient number, since it is larger than the sum of its proper divisors (1).

521925036901 is an equidigital number, since it uses as much as digits as its factorization.

521925036901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 43.

The spelling of 521925036901 in words is "five hundred twenty-one billion, nine hundred twenty-five million, thirty-six thousand, nine hundred one".