72015006531 has 12 divisors (see below), whose sum is σ = 103974329688. Its totient is φ = 44316926784.

The previous prime is 72015006517. The next prime is 72015006533. The reversal of 72015006531 is 13560051027.

It is not a de Polignac number, because 72015006531 - 2³⁵ = 37655268163 is a prime.

It is a super-2 number, since 2×72015006531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72015006533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71020210 + ... + 71021223.

It is an arithmetic number, because the mean of its divisors is an integer number (8664527474).

Almost surely, 2^72015006531 is an apocalyptic number.

72015006531 is a deficient number, since it is larger than the sum of its proper divisors (31959323157).

72015006531 is a wasteful number, since it uses less digits than its factorization.

72015006531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142041462 (or 142041449 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

Adding to 72015006531 its reverse (13560051027), we get a palindrome (85575057558).

The spelling of 72015006531 in words is "seventy-two billion, fifteen million, six thousand, five hundred thirty-one".