15131052021 has 16 divisors (see below), whose sum is σ = 22159895040. Its totient is φ = 9140955120.

The previous prime is 15131051959. The next prime is 15131052029. The reversal of 15131052021 is 12025013151.

It is not a de Polignac number, because 15131052021 - 2¹⁴ = 15131035637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15131052029) 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 15 ways as a sum of consecutive naturals, for example, 5769495 + ... + 5772116.

It is an arithmetic number, because the mean of its divisors is an integer number (1384993440).

Almost surely, 2^15131052021 is an apocalyptic number.

It is an amenable number.

15131052021 is a deficient number, since it is larger than the sum of its proper divisors (7028843019).

15131052021 is a wasteful number, since it uses less digits than its factorization.

15131052021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11541656.

The product of its (nonzero) digits is 300, while the sum is 21.

Adding to 15131052021 its reverse (12025013151), we get a palindrome (27156065172).

The spelling of 15131052021 in words is "fifteen billion, one hundred thirty-one million, fifty-two thousand, twenty-one".