15116006021 has 4 divisors (see below), whose sum is σ = 15121507500. Its totient is φ = 15110504544.

The previous prime is 15116005999. The next prime is 15116006041. The reversal of 15116006021 is 12060061151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12060061151 = 2593 ⋅4651007.

It can be written as a sum of positive squares in 2 ways, for example, as 8152103521 + 6963902500 = 90289^2 + 83450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15116006021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15116006041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2746616 + ... + 2752113.

It is an arithmetic number, because the mean of its divisors is an integer number (3780376875).

Almost surely, 2^15116006021 is an apocalyptic number.

It is an amenable number.

15116006021 is a deficient number, since it is larger than the sum of its proper divisors (5501479).

15116006021 is an equidigital number, since it uses as much as digits as its factorization.

15116006021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5501478.

The product of its (nonzero) digits is 360, while the sum is 23.

Adding to 15116006021 its reverse (12060061151), we get a palindrome (27176067172).

The spelling of 15116006021 in words is "fifteen billion, one hundred sixteen million, six thousand, twenty-one".