82551471 has 8 divisors (see below), whose sum is σ = 110628144. Its totient is φ = 54754560.

The previous prime is 82551467. The next prime is 82551479. The reversal of 82551471 is 17415528.

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

It is not a de Polignac number, because 82551471 - 2² = 82551467 is a prime.

It is a super-3 number, since 3×82551471³ (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 (82551479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69250 + ... + 70431.

It is an arithmetic number, because the mean of its divisors is an integer number (13828518).

Almost surely, 2^82551471 is an apocalyptic number.

82551471 is a deficient number, since it is larger than the sum of its proper divisors (28076673).

82551471 is a wasteful number, since it uses less digits than its factorization.

82551471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139881.

The product of its digits is 11200, while the sum is 33.

The square root of 82551471 is about 9085.7840057972. The cubic root of 82551471 is about 435.4198984195.

Adding to 82551471 its reverse (17415528), we get a palindrome (99966999).

The spelling of 82551471 in words is "eighty-two million, five hundred fifty-one thousand, four hundred seventy-one".