1500200221 has 4 divisors (see below), whose sum is σ = 1615600252. Its totient is φ = 1384800192.

The previous prime is 1500200203. The next prime is 1500200243. The reversal of 1500200221 is 1220020051.

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 888874596 + 611325625 = 29814^2 + 24725^2 .

It is a cyclic number.

It is not a de Polignac number, because 1500200221 - 2¹⁷ = 1500069149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 115400017 = 1500200221 / (1 + 5 + 0 + 0 + 2 + 0 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1500204221) 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, 57699996 + ... + 57700021.

It is an arithmetic number, because the mean of its divisors is an integer number (403900063).

Almost surely, 2^1500200221 is an apocalyptic number.

It is an amenable number.

1500200221 is a deficient number, since it is larger than the sum of its proper divisors (115400031).

1500200221 is a wasteful number, since it uses less digits than its factorization.

1500200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115400030.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1500200221 is about 38732.4182178185. The cubic root of 1500200221 is about 1144.7651726941.

Adding to 1500200221 its reverse (1220020051), we get a palindrome (2720220272).

The spelling of 1500200221 in words is "one billion, five hundred million, two hundred thousand, two hundred twenty-one".