521379541 has 2 divisors, whose sum is σ = 521379542. Its totient is φ = 521379540.

The previous prime is 521379503. The next prime is 521379557. The reversal of 521379541 is 145973125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 500640625 + 20738916 = 22375^2 + 4554^2 .

It is a cyclic number.

It is not a de Polignac number, because 521379541 - 2²¹ = 519282389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521379541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521377541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260689770 + 260689771.

It is an arithmetic number, because the mean of its divisors is an integer number (260689771).

Almost surely, 2^521379541 is an apocalyptic number.

It is an amenable number.

521379541 is a deficient number, since it is larger than the sum of its proper divisors (1).

521379541 is an equidigital number, since it uses as much as digits as its factorization.

521379541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 37.

The square root of 521379541 is about 22833.7369039761. The cubic root of 521379541 is about 804.8556463507.

The spelling of 521379541 in words is "five hundred twenty-one million, three hundred seventy-nine thousand, five hundred forty-one".