520161541 has 2 divisors, whose sum is σ = 520161542. Its totient is φ = 520161540.

The previous prime is 520161539. The next prime is 520161553. The reversal of 520161541 is 145161025.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319372641 + 200788900 = 17871^2 + 14170^2 .

It is a cyclic number.

It is not a de Polignac number, because 520161541 - 2¹ = 520161539 is a prime.

Together with 520161539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520161511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260080770 + 260080771.

It is an arithmetic number, because the mean of its divisors is an integer number (260080771).

Almost surely, 2^520161541 is an apocalyptic number.

It is an amenable number.

520161541 is a deficient number, since it is larger than the sum of its proper divisors (1).

520161541 is an equidigital number, since it uses as much as digits as its factorization.

520161541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 520161541 is about 22807.0502476756. The cubic root of 520161541 is about 804.2284138733.

The spelling of 520161541 in words is "five hundred twenty million, one hundred sixty-one thousand, five hundred forty-one".