12006131515 has 64 divisors (see below), whose sum is σ = 17827061760. Its totient is φ = 7585643520.

The previous prime is 12006131509. The next prime is 12006131539. The reversal of 12006131515 is 51513160021.

It is a happy number.

It is not a de Polignac number, because 12006131515 - 2³ = 12006131507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12006131515.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2294332 + ... + 2299558.

It is an arithmetic number, because the mean of its divisors is an integer number (278547840).

Almost surely, 2^12006131515 is an apocalyptic number.

12006131515 is a deficient number, since it is larger than the sum of its proper divisors (5820930245).

12006131515 is a wasteful number, since it uses less digits than its factorization.

12006131515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5372.

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 12006131515 its reverse (51513160021), we get a palindrome (63519291536).

The spelling of 12006131515 in words is "twelve billion, six million, one hundred thirty-one thousand, five hundred fifteen".