520206972 has 12 divisors (see below), whose sum is σ = 1213816296. Its totient is φ = 173402320.

The previous prime is 520206971. The next prime is 520207003. The reversal of 520206972 is 279602025.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520206971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21675279 + ... + 21675302.

It is an arithmetic number, because the mean of its divisors is an integer number (101151358).

Almost surely, 2^520206972 is an apocalyptic number.

It is an amenable number.

520206972 is an abundant number, since it is smaller than the sum of its proper divisors (693609324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520206972 is a wasteful number, since it uses less digits than its factorization.

520206972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43350588 (or 43350586 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 520206972 is about 22808.0462118087. The cubic root of 520206972 is about 804.2518270085.

Adding to 520206972 its reverse (279602025), we get a palindrome (799808997).

The spelling of 520206972 in words is "five hundred twenty million, two hundred six thousand, nine hundred seventy-two".