72512131515 has 8 divisors (see below), whose sum is σ = 116019410448. Its totient is φ = 38673136800.

The previous prime is 72512131481. The next prime is 72512131519. The reversal of 72512131515 is 51513121527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72512131515 - 2¹⁰ = 72512130491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72512131519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2417071036 + ... + 2417071065.

It is an arithmetic number, because the mean of its divisors is an integer number (14502426306).

Almost surely, 2^72512131515 is an apocalyptic number.

72512131515 is a deficient number, since it is larger than the sum of its proper divisors (43507278933).

72512131515 is a wasteful number, since it uses less digits than its factorization.

72512131515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4834142109.

The product of its digits is 10500, while the sum is 33.

The spelling of 72512131515 in words is "seventy-two billion, five hundred twelve million, one hundred thirty-one thousand, five hundred fifteen".