520773431 has 4 divisors (see below), whose sum is σ = 533475264. Its totient is φ = 508071600.

The previous prime is 520773419. The next prime is 520773467. The reversal of 520773431 is 134377025.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520773431 is a prime.

It is a super-2 number, since 2×520773431² = 542409932871023522, 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 (520773131) 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, 6350855 + ... + 6350936.

It is an arithmetic number, because the mean of its divisors is an integer number (133368816).

Almost surely, 2^520773431 is an apocalyptic number.

520773431 is a deficient number, since it is larger than the sum of its proper divisors (12701833).

520773431 is a wasteful number, since it uses less digits than its factorization.

520773431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12701832.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 520773431 is about 22820.4607972758. The cubic root of 520773431 is about 804.5436406197.

The spelling of 520773431 in words is "five hundred twenty million, seven hundred seventy-three thousand, four hundred thirty-one".