72538143 has 16 divisors (see below), whose sum is σ = 104294400. Its totient is φ = 44694720.

The previous prime is 72538069. The next prime is 72538157. The reversal of 72538143 is 34183527.

It is not a de Polignac number, because 72538143 - 2⁸ = 72537887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72538043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13183 + ... + 17856.

It is an arithmetic number, because the mean of its divisors is an integer number (6518400).

Almost surely, 2^72538143 is an apocalyptic number.

72538143 is a deficient number, since it is larger than the sum of its proper divisors (31756257).

72538143 is a wasteful number, since it uses less digits than its factorization.

72538143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31102.

The product of its digits is 20160, while the sum is 33.

The square root of 72538143 is about 8516.9327225240. The cubic root of 72538143 is about 417.0506583500.

The spelling of 72538143 in words is "seventy-two million, five hundred thirty-eight thousand, one hundred forty-three".