82187251 has 2 divisors, whose sum is σ = 82187252. Its totient is φ = 82187250.

The previous prime is 82187221. The next prime is 82187263. The reversal of 82187251 is 15278128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82187251 - 2⁵ = 82187219 is a prime.

It is not a weakly prime, because it can be changed into another prime (82187201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41093625 + 41093626.

It is an arithmetic number, because the mean of its divisors is an integer number (41093626).

Almost surely, 2^82187251 is an apocalyptic number.

82187251 is a deficient number, since it is larger than the sum of its proper divisors (1).

82187251 is an equidigital number, since it uses as much as digits as its factorization.

82187251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 34.

The square root of 82187251 is about 9065.7184491909. The cubic root of 82187251 is about 434.7785916900.

The spelling of 82187251 in words is "eighty-two million, one hundred eighty-seven thousand, two hundred fifty-one".