520220745 has 48 divisors (see below), whose sum is σ = 1016588160. Its totient is φ = 252220320.

The previous prime is 520220737. The next prime is 520220747. The reversal of 520220745 is 547022025.

It is not a de Polignac number, because 520220745 - 2³ = 520220737 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (520220747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 412 + ... + 32258.

It is an arithmetic number, because the mean of its divisors is an integer number (21178920).

Almost surely, 2^520220745 is an apocalyptic number.

520220745 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

520220745 is a deficient number, since it is larger than the sum of its proper divisors (496367415).

520220745 is a wasteful number, since it uses less digits than its factorization.

520220745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31883 (or 31866 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 520220745 is about 22808.3481427305. The cubic root of 520220745 is about 804.2589247364.

The spelling of 520220745 in words is "five hundred twenty million, two hundred twenty thousand, seven hundred forty-five".