521113541 has 8 divisors (see below), whose sum is σ = 564445560. Its totient is φ = 478245312.

The previous prime is 521113531. The next prime is 521113559. The reversal of 521113541 is 145311125.

It can be written as a sum of positive squares in 4 ways, for example, as 199628641 + 321484900 = 14129^2 + 17930^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521113541 is a prime.

It is a super-2 number, since 2×521113541² = 543118645227117362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521113531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113606 + ... + 118103.

It is an arithmetic number, because the mean of its divisors is an integer number (70555695).

Almost surely, 2^521113541 is an apocalyptic number.

It is an amenable number.

521113541 is a deficient number, since it is larger than the sum of its proper divisors (43332019).

521113541 is a wasteful number, since it uses less digits than its factorization.

521113541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231895.

The product of its digits is 600, while the sum is 23.

The square root of 521113541 is about 22827.9114462975. The cubic root of 521113541 is about 804.7187479852.

Adding to 521113541 its reverse (145311125), we get a palindrome (666424666).

The spelling of 521113541 in words is "five hundred twenty-one million, one hundred thirteen thousand, five hundred forty-one".