520544145 has 32 divisors (see below), whose sum is σ = 909609984. Its totient is φ = 252100800.

The previous prime is 520544107. The next prime is 520544147. The reversal of 520544145 is 541445025.

It is not a de Polignac number, because 520544145 - 2¹² = 520540049 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (520544147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283380 + ... + 285210.

It is an arithmetic number, because the mean of its divisors is an integer number (28425312).

Almost surely, 2^520544145 is an apocalyptic number.

520544145 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

520544145 is a deficient number, since it is larger than the sum of its proper divisors (389065839).

520544145 is a wasteful number, since it uses less digits than its factorization.

520544145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3573.

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 520544145 is about 22815.4365507215. The cubic root of 520544145 is about 804.4255485271.

The spelling of 520544145 in words is "five hundred twenty million, five hundred forty-four thousand, one hundred forty-five".