524081521 has 2 divisors, whose sum is σ = 524081522. Its totient is φ = 524081520.

The previous prime is 524081513. The next prime is 524081531. The reversal of 524081521 is 125180425.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 272415025 + 251666496 = 16505^2 + 15864^2 .

It is a cyclic number.

It is not a de Polignac number, because 524081521 - 2³ = 524081513 is a prime.

It is a super-2 number, since 2×524081521² = 549322881307346882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 524081521.

It is not a weakly prime, because it can be changed into another prime (524081531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262040760 + 262040761.

It is an arithmetic number, because the mean of its divisors is an integer number (262040761).

Almost surely, 2^524081521 is an apocalyptic number.

It is an amenable number.

524081521 is a deficient number, since it is larger than the sum of its proper divisors (1).

524081521 is an equidigital number, since it uses as much as digits as its factorization.

524081521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 524081521 is about 22892.8268459795. The cubic root of 524081521 is about 806.2436038513.

The spelling of 524081521 in words is "five hundred twenty-four million, eighty-one thousand, five hundred twenty-one".