520954681 has 32 divisors (see below), whose sum is σ = 609493248. Its totient is φ = 440985600.

The previous prime is 520954661. The next prime is 520954697. The reversal of 520954681 is 186459025.

It is a cyclic number.

It is not a de Polignac number, because 520954681 - 2⁹ = 520954169 is a prime.

It is a super-2 number, since 2×520954681² = 542787559311623522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (520954631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2235741 + ... + 2235973.

It is an arithmetic number, because the mean of its divisors is an integer number (19046664).

Almost surely, 2^520954681 is an apocalyptic number.

It is an amenable number.

520954681 is a deficient number, since it is larger than the sum of its proper divisors (88538567).

520954681 is a wasteful number, since it uses less digits than its factorization.

520954681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 520954681 is about 22824.4316687185. The cubic root of 520954681 is about 804.6369675907.

The spelling of 520954681 in words is "five hundred twenty million, nine hundred fifty-four thousand, six hundred eighty-one".