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72441471 = 3171974759
BaseRepresentation
bin1000101000101…
…01111001111111
312001022102000110
410110111321333
5122021111341
611104401103
71536512424
oct424257177
9161272013
1072441471
1137989393
1220316193
1312014b9b
149899d4b
15655e216
hex4515e7f

72441471 has 16 divisors (see below), whose sum is σ = 107654400. Its totient is φ = 43060608.

The previous prime is 72441469. The next prime is 72441497. The reversal of 72441471 is 17414427.

It is not a de Polignac number, because 72441471 - 21 = 72441469 is a prime.

It is a super-3 number, since 3×724414713 (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72441401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36411 + ... + 38348.

It is an arithmetic number, because the mean of its divisors is an integer number (6728400).

Almost surely, 272441471 is an apocalyptic number.

72441471 is a deficient number, since it is larger than the sum of its proper divisors (35212929).

72441471 is a wasteful number, since it uses less digits than its factorization.

72441471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74798.

The product of its digits is 6272, while the sum is 30.

The square root of 72441471 is about 8511.2555478026. The cubic root of 72441471 is about 416.8653073832.

Adding to 72441471 its reverse (17414427), we get a palindrome (89855898).

It can be divided in two parts, 724 and 41471, that added together give a triangular number (42195 = T290).

The spelling of 72441471 in words is "seventy-two million, four hundred forty-one thousand, four hundred seventy-one".

Divisors: 1 3 17 19 51 57 323 969 74759 224277 1270903 1420421 3812709 4261263 24147157 72441471