1500130021 has 24 divisors (see below), whose sum is σ = 1684419840. Its totient is φ = 1333987200.

The previous prime is 1500130013. The next prime is 1500130033. The reversal of 1500130021 is 1200310051.

It is not a de Polignac number, because 1500130021 - 2³ = 1500130013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1500129983 and 1500130010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1500130001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1471650 + ... + 1472668.

It is an arithmetic number, because the mean of its divisors is an integer number (70184160).

Almost surely, 2^1500130021 is an apocalyptic number.

It is an amenable number.

1500130021 is a deficient number, since it is larger than the sum of its proper divisors (184289819).

1500130021 is a wasteful number, since it uses less digits than its factorization.

1500130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357 (or 1344 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1500130021 is about 38731.5119895932. The cubic root of 1500130021 is about 1144.7473164623.

Adding to 1500130021 its reverse (1200310051), we get a palindrome (2700440072).

The spelling of 1500130021 in words is "one billion, five hundred million, one hundred thirty thousand, twenty-one".