72204271 has 4 divisors (see below), whose sum is σ = 72359352. Its totient is φ = 72049192.

The previous prime is 72204269. The next prime is 72204281. The reversal of 72204271 is 17240227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17240227 = 17 ⋅1014131.

It is a cyclic number.

It is not a de Polignac number, because 72204271 - 2¹ = 72204269 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 (72204241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76840 + ... + 77773.

It is an arithmetic number, because the mean of its divisors is an integer number (18089838).

Almost surely, 2^72204271 is an apocalyptic number.

72204271 is a deficient number, since it is larger than the sum of its proper divisors (155081).

72204271 is a wasteful number, since it uses less digits than its factorization.

72204271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155080.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 72204271 is about 8497.3096330545. The cubic root of 72204271 is about 416.4098198016.

Adding to 72204271 its reverse (17240227), we get a palindrome (89444498).

The spelling of 72204271 in words is "seventy-two million, two hundred four thousand, two hundred seventy-one".