520231553 has 12 divisors (see below), whose sum is σ = 541938432. Its totient is φ = 498856560.

The previous prime is 520231541. The next prime is 520231573. The reversal of 520231553 is 355132025.

It is not a de Polignac number, because 520231553 - 2¹² = 520227457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (520231513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1640951 + ... + 1641267.

It is an arithmetic number, because the mean of its divisors is an integer number (45161536).

Almost surely, 2^520231553 is an apocalyptic number.

It is an amenable number.

520231553 is a deficient number, since it is larger than the sum of its proper divisors (21706879).

520231553 is an equidigital number, since it uses as much as digits as its factorization.

520231553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 520231553 is about 22808.5850722924. The cubic root of 520231553 is about 804.2644944043.

Adding to 520231553 its reverse (355132025), we get a palindrome (875363578).

The spelling of 520231553 in words is "five hundred twenty million, two hundred thirty-one thousand, five hundred fifty-three".