82109451 has 8 divisors (see below), whose sum is σ = 110979280. Its totient is φ = 53989632.

The previous prime is 82109449. The next prime is 82109453. The reversal of 82109451 is 15490128.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (82109449) and next prime (82109453).

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

It is not a de Polignac number, because 82109451 - 2¹ = 82109449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82109453) 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, 187246 + ... + 187683.

It is an arithmetic number, because the mean of its divisors is an integer number (13872410).

Almost surely, 2^82109451 is an apocalyptic number.

82109451 is a deficient number, since it is larger than the sum of its proper divisors (28869829).

82109451 is a wasteful number, since it uses less digits than its factorization.

82109451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375005.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 82109451 is about 9061.4265433209. The cubic root of 82109451 is about 434.6413585100.

Adding to 82109451 its reverse (15490128), we get a palindrome (97599579).

The spelling of 82109451 in words is "eighty-two million, one hundred nine thousand, four hundred fifty-one".