524530661 has 4 divisors (see below), whose sum is σ = 525126924. Its totient is φ = 523934400.

The previous prime is 524530621. The next prime is 524530679. The reversal of 524530661 is 166035425.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62710561 + 461820100 = 7919^2 + 21490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-524530661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (524530621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296810 + ... + 298571.

It is an arithmetic number, because the mean of its divisors is an integer number (131281731).

Almost surely, 2^524530661 is an apocalyptic number.

It is an amenable number.

524530661 is a deficient number, since it is larger than the sum of its proper divisors (596263).

524530661 is an equidigital number, since it uses as much as digits as its factorization.

524530661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596262.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 524530661 is about 22902.6343681246. The cubic root of 524530661 is about 806.4738561065.

The spelling of 524530661 in words is "five hundred twenty-four million, five hundred thirty thousand, six hundred sixty-one".