520231545 has 16 divisors (see below), whose sum is σ = 924856320. Its totient is φ = 277456752.

The previous prime is 520231541. The next prime is 520231573. The reversal of 520231545 is 545132025.

It is a happy number.

It is not a de Polignac number, because 520231545 - 2² = 520231541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (520231541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1926649 + ... + 1926918.

It is an arithmetic number, because the mean of its divisors is an integer number (57803520).

Almost surely, 2^520231545 is an apocalyptic number.

It is an amenable number.

520231545 is a deficient number, since it is larger than the sum of its proper divisors (404624775).

520231545 is a wasteful number, since it uses less digits than its factorization.

520231545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3853581 (or 3853575 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 520231545 is about 22808.5848969198. The cubic root of 520231545 is about 804.2644902817.

The spelling of 520231545 in words is "five hundred twenty million, two hundred thirty-one thousand, five hundred forty-five".