520622161 has 8 divisors (see below), whose sum is σ = 551745864. Its totient is φ = 489553920.

The previous prime is 520622131. The next prime is 520622191. The reversal of 520622161 is 161226025.

It is an interprime number because it is at equal distance from previous prime (520622131) and next prime (520622191).

It can be written as a sum of positive squares in 4 ways, for example, as 317730625 + 202891536 = 17825^2 + 14244^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520622161 - 2¹⁵ = 520589393 is a prime.

It is a super-3 number, since 3×520622161³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520622101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6321 + ... + 32881.

It is an arithmetic number, because the mean of its divisors is an integer number (68968233).

Almost surely, 2^520622161 is an apocalyptic number.

It is an amenable number.

520622161 is a deficient number, since it is larger than the sum of its proper divisors (31123703).

520622161 is a wasteful number, since it uses less digits than its factorization.

520622161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27731.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 520622161 is about 22817.1462063072. The cubic root of 520622161 is about 804.4657339941.

Adding to 520622161 its reverse (161226025), we get a palindrome (681848186).

The spelling of 520622161 in words is "five hundred twenty million, six hundred twenty-two thousand, one hundred sixty-one".