513525247 has 4 divisors (see below), whose sum is σ = 514288960. Its totient is φ = 512761536.

The previous prime is 513525227. The next prime is 513525277. The reversal of 513525247 is 742525315.

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

It is a cyclic number.

It is not a de Polignac number, because 513525247 - 2⁷ = 513525119 is a prime.

It is a super-2 number, since 2×513525247² = 527416358612822018, 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 (513525227) 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, 380847 + ... + 382192.

It is an arithmetic number, because the mean of its divisors is an integer number (128572240).

Almost surely, 2^513525247 is an apocalyptic number.

513525247 is a deficient number, since it is larger than the sum of its proper divisors (763713).

513525247 is an equidigital number, since it uses as much as digits as its factorization.

513525247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763712.

The product of its digits is 42000, while the sum is 34.

The square root of 513525247 is about 22661.0954501321. The cubic root of 513525247 is about 800.7936119439.

The spelling of 513525247 in words is "five hundred thirteen million, five hundred twenty-five thousand, two hundred forty-seven".