500372161 has 3 divisors (see below), whose sum is σ = 500394531. Its totient is φ = 500349792.

The previous prime is 500372143. The next prime is 500372207. The reversal of 500372161 is 161273005.

The square root of 500372161 is 22369.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 230098561 + 270273600 = 15169^2 + 16440^2 .

It is not a de Polignac number, because 500372161 - 2⁹ = 500371649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (500372111) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11185 + ... + 33553.

It is an arithmetic number, because the mean of its divisors is an integer number (166798177).

Almost surely, 2^500372161 is an apocalyptic number.

500372161 is the 22369-th square number.

500372161 is the 11185-th centered octagonal number.

It is an amenable number.

500372161 is a deficient number, since it is larger than the sum of its proper divisors (22370).

500372161 is an frugal number, since it uses more digits than its factorization.

500372161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44738 (or 22369 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The cubic root of 500372161 is about 793.8974000672.

Multiplying 500372161 by its sum of digits (25), we get a square (12509304025 = 111845²).

The spelling of 500372161 in words is "five hundred million, three hundred seventy-two thousand, one hundred sixty-one".