1500220221 has 16 divisors (see below), whose sum is σ = 2110118400. Its totient is φ = 945461808.

The previous prime is 1500220219. The next prime is 1500220229. The reversal of 1500220221 is 1220220051.

It is not a de Polignac number, because 1500220221 - 2¹ = 1500220219 is a prime.

It is a super-2 number, since 2×1500220221² = 4501321422994577682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1500220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1500220229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1561 + ... + 54798.

It is an arithmetic number, because the mean of its divisors is an integer number (131882400).

Almost surely, 2^1500220221 is an apocalyptic number.

It is an amenable number.

1500220221 is a deficient number, since it is larger than the sum of its proper divisors (609898179).

1500220221 is a wasteful number, since it uses less digits than its factorization.

1500220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56848.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1500220221 is about 38732.6763986172. The cubic root of 1500220221 is about 1144.7702598376.

Adding to 1500220221 its reverse (1220220051), we get a palindrome (2720440272).

The spelling of 1500220221 in words is "one billion, five hundred million, two hundred twenty thousand, two hundred twenty-one".