521040523 has 2 divisors, whose sum is σ = 521040524. Its totient is φ = 521040522.

The previous prime is 521040491. The next prime is 521040557. The reversal of 521040523 is 325040125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521040523 - 2⁵ = 521040491 is a prime.

It is a super-2 number, since 2×521040523² = 542966453216227058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521040494 and 521040503.

It is not a weakly prime, because it can be changed into another prime (521040323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260520261 + 260520262.

It is an arithmetic number, because the mean of its divisors is an integer number (260520262).

Almost surely, 2^521040523 is an apocalyptic number.

521040523 is a deficient number, since it is larger than the sum of its proper divisors (1).

521040523 is an equidigital number, since it uses as much as digits as its factorization.

521040523 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 22.

The square root of 521040523 is about 22826.3120761984. The cubic root of 521040523 is about 804.6811607202.

Adding to 521040523 its reverse (325040125), we get a palindrome (846080648).

The spelling of 521040523 in words is "five hundred twenty-one million, forty thousand, five hundred twenty-three".