531521245 has 4 divisors (see below), whose sum is σ = 637825500. Its totient is φ = 425216992.

The previous prime is 531521227. The next prime is 531521273. The reversal of 531521245 is 542125135.

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 299324601 + 232196644 = 17301^2 + 15238^2 .

It is a cyclic number.

It is not a de Polignac number, because 531521245 - 2⁵ = 531521213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53152120 + ... + 53152129.

It is an arithmetic number, because the mean of its divisors is an integer number (159456375).

Almost surely, 2^531521245 is an apocalyptic number.

It is an amenable number.

531521245 is a deficient number, since it is larger than the sum of its proper divisors (106304255).

531521245 is a wasteful number, since it uses less digits than its factorization.

531521245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106304254.

The product of its digits is 6000, while the sum is 28.

The square root of 531521245 is about 23054.7445225489. The cubic root of 531521245 is about 810.0407666319.

The spelling of 531521245 in words is "five hundred thirty-one million, five hundred twenty-one thousand, two hundred forty-five".