520341561 has 6 divisors (see below), whose sum is σ = 751604490. Its totient is φ = 346894368.

The previous prime is 520341553. The next prime is 520341583. The reversal of 520341561 is 165143025.

It can be written as a sum of positive squares in only one way, i.e., 446054400 + 74287161 = 21120^2 + 8619^2 .

It is not a de Polignac number, because 520341561 - 2³ = 520341553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520341511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28907856 + ... + 28907873.

It is an arithmetic number, because the mean of its divisors is an integer number (125267415).

Almost surely, 2^520341561 is an apocalyptic number.

It is an amenable number.

520341561 is a deficient number, since it is larger than the sum of its proper divisors (231262929).

520341561 is a wasteful number, since it uses less digits than its factorization.

520341561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57815735 (or 57815732 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 520341561 is about 22810.9964929198. The cubic root of 520341561 is about 804.3211802476.

Adding to 520341561 its reverse (165143025), we get a palindrome (685484586).

It can be divided in two parts, 5203 and 41561, that added together give a palindrome (46764).

The spelling of 520341561 in words is "five hundred twenty million, three hundred forty-one thousand, five hundred sixty-one".