500156221 has 4 divisors (see below), whose sum is σ = 500445244. Its totient is φ = 499867200.

The previous prime is 500156207. The next prime is 500156227. The reversal of 500156221 is 122651005.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127125625 + 373030596 = 11275^2 + 19314^2 .

It is a cyclic number.

It is not a de Polignac number, because 500156221 - 2⁹ = 500155709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 500156192 and 500156201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500156227) 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, 141900 + ... + 145381.

It is an arithmetic number, because the mean of its divisors is an integer number (125111311).

Almost surely, 2^500156221 is an apocalyptic number.

It is an amenable number.

500156221 is a deficient number, since it is larger than the sum of its proper divisors (289023).

500156221 is a wasteful number, since it uses less digits than its factorization.

500156221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289022.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 500156221 is about 22364.1727099394. The cubic root of 500156221 is about 793.7831791698.

The spelling of 500156221 in words is "five hundred million, one hundred fifty-six thousand, two hundred twenty-one".