520730901 has 48 divisors (see below), whose sum is σ = 799418880. Its totient is φ = 326177280.

The previous prime is 520730887. The next prime is 520730911. The reversal of 520730901 is 109037025.

It is a de Polignac number, because none of the positive numbers 2^k-520730901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520730911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1663521 + ... + 1663833.

It is an arithmetic number, because the mean of its divisors is an integer number (16654560).

Almost surely, 2^520730901 is an apocalyptic number.

It is an amenable number.

520730901 is a deficient number, since it is larger than the sum of its proper divisors (278687979).

520730901 is a wasteful number, since it uses less digits than its factorization.

520730901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 520730901 is about 22819.5289390469. The cubic root of 520730901 is about 804.5217384703.

Adding to 520730901 its reverse (109037025), we get a palindrome (629767926).

The spelling of 520730901 in words is "five hundred twenty million, seven hundred thirty thousand, nine hundred one".