520023222161 has 8 divisors (see below), whose sum is σ = 522934631424. Its totient is φ = 517113779680.

The previous prime is 520023222139. The next prime is 520023222193. The reversal of 520023222161 is 161222320025.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520023222161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 520023222161.

It is not an unprimeable number, because it can be changed into a prime (520023228161) 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, 40196 + ... + 1020618.

It is an arithmetic number, because the mean of its divisors is an integer number (65366828928).

Almost surely, 2^520023222161 is an apocalyptic number.

It is an amenable number.

520023222161 is a deficient number, since it is larger than the sum of its proper divisors (2911409263).

520023222161 is a wasteful number, since it uses less digits than its factorization.

520023222161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983391.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 520023222161 its reverse (161222320025), we get a palindrome (681245542186).

The spelling of 520023222161 in words is "five hundred twenty billion, twenty-three million, two hundred twenty-two thousand, one hundred sixty-one".