72551271 has 8 divisors (see below), whose sum is σ = 104176240. Its totient is φ = 44646912.

The previous prime is 72551251. The next prime is 72551273. The reversal of 72551271 is 17215527.

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

It is not a de Polignac number, because 72551271 - 2¹⁵ = 72518503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72551273) 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 7 ways as a sum of consecutive naturals, for example, 930106 + ... + 930183.

It is an arithmetic number, because the mean of its divisors is an integer number (13022030).

Almost surely, 2^72551271 is an apocalyptic number.

72551271 is a deficient number, since it is larger than the sum of its proper divisors (31624969).

72551271 is a wasteful number, since it uses less digits than its factorization.

72551271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860305.

The product of its digits is 4900, while the sum is 30.

The square root of 72551271 is about 8517.7033876509. The cubic root of 72551271 is about 417.0758161983.

Adding to 72551271 its reverse (17215527), we get a palindrome (89766798).

The spelling of 72551271 in words is "seventy-two million, five hundred fifty-one thousand, two hundred seventy-one".