72555015 has 32 divisors (see below), whose sum is σ = 131604480. Its totient is φ = 33837696.

The previous prime is 72555001. The next prime is 72555017. The reversal of 72555015 is 51055527.

It is not a de Polignac number, because 72555015 - 2¹⁰ = 72553991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72555017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6087 + ... + 13496.

It is an arithmetic number, because the mean of its divisors is an integer number (4112640).

Almost surely, 2^72555015 is an apocalyptic number.

72555015 is a deficient number, since it is larger than the sum of its proper divisors (59049465).

72555015 is a wasteful number, since it uses less digits than its factorization.

72555015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19623.

The product of its (nonzero) digits is 8750, while the sum is 30.

The square root of 72555015 is about 8517.9231623677. The cubic root of 72555015 is about 417.0829904580.

The spelling of 72555015 in words is "seventy-two million, five hundred fifty-five thousand, fifteen".