72151471 has 24 divisors (see below), whose sum is σ = 86512320. Its totient is φ = 59976000.

The previous prime is 72151459. The next prime is 72151481. The reversal of 72151471 is 17415127.

It is not a de Polignac number, because 72151471 - 2¹¹ = 72149423 is a prime.

It is a super-3 number, since 3×72151471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72151421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 301770 + ... + 302008.

It is an arithmetic number, because the mean of its divisors is an integer number (3604680).

Almost surely, 2^72151471 is an apocalyptic number.

72151471 is a deficient number, since it is larger than the sum of its proper divisors (14360849).

72151471 is a wasteful number, since it uses less digits than its factorization.

72151471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 408 counting only the distinct ones).

The product of its digits is 1960, while the sum is 28.

The square root of 72151471 is about 8494.2021991474. The cubic root of 72151471 is about 416.3082939517.

Adding to 72151471 its reverse (17415127), we get a palindrome (89566598).

The spelling of 72151471 in words is "seventy-two million, one hundred fifty-one thousand, four hundred seventy-one".