82015251 has 8 divisors (see below), whose sum is σ = 111207360. Its totient is φ = 53749992.

The previous prime is 82015247. The next prime is 82015313. The reversal of 82015251 is 15251028.

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

It is not a de Polignac number, because 82015251 - 2² = 82015247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82015201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231505 + ... + 231858.

It is an arithmetic number, because the mean of its divisors is an integer number (13900920).

Almost surely, 2^82015251 is an apocalyptic number.

82015251 is a deficient number, since it is larger than the sum of its proper divisors (29192109).

82015251 is a wasteful number, since it uses less digits than its factorization.

82015251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463425.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 82015251 is about 9056.2271945883. The cubic root of 82015251 is about 434.4750809264.

Adding to 82015251 its reverse (15251028), we get a palindrome (97266279).

The spelling of 82015251 in words is "eighty-two million, fifteen thousand, two hundred fifty-one".