2015430021 has 12 divisors (see below), whose sum is σ = 3175829280. Its totient is φ = 1221472680.

The previous prime is 2015430007. The next prime is 2015430041. The reversal of 2015430021 is 1200345102.

It is not a de Polignac number, because 2015430021 - 2⁷ = 2015429893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2015429976 and 2015430003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015430041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10178841 + ... + 10179038.

It is an arithmetic number, because the mean of its divisors is an integer number (264652440).

Almost surely, 2^2015430021 is an apocalyptic number.

It is an amenable number.

2015430021 is a deficient number, since it is larger than the sum of its proper divisors (1160399259).

2015430021 is a wasteful number, since it uses less digits than its factorization.

2015430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20357896 (or 20357893 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2015430021 is about 44893.5409719483. The cubic root of 2015430021 is about 1263.1528543305.

Adding to 2015430021 its reverse (1200345102), we get a palindrome (3215775123).

The spelling of 2015430021 in words is "two billion, fifteen million, four hundred thirty thousand, twenty-one".