1500500221 has 4 divisors (see below), whose sum is σ = 1636909344. Its totient is φ = 1364091100.

The previous prime is 1500500159. The next prime is 1500500231. The reversal of 1500500221 is 1220050051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1500500221 - 2¹⁷ = 1500369149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1500500195 and 1500500204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1500500231) 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, 68204545 + ... + 68204566.

It is an arithmetic number, because the mean of its divisors is an integer number (409227336).

Almost surely, 2^1500500221 is an apocalyptic number.

1500500221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1500500221 is a deficient number, since it is larger than the sum of its proper divisors (136409123).

1500500221 is a wasteful number, since it uses less digits than its factorization.

1500500221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136409122.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1500500221 is about 38736.2907491154. The cubic root of 1500500221 is about 1144.8414751008.

Adding to 1500500221 its reverse (1220050051), we get a palindrome (2720550272).

The spelling of 1500500221 in words is "one billion, five hundred million, five hundred thousand, two hundred twenty-one".