82864531 has 2 divisors, whose sum is σ = 82864532. Its totient is φ = 82864530.

The previous prime is 82864517. The next prime is 82864543. The reversal of 82864531 is 13546828.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82864531 - 2¹³ = 82856339 is a prime.

It is a super-2 number, since 2×82864531² = 13733060995699922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82864631) 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 as a sum of consecutive naturals, namely, 41432265 + 41432266.

It is an arithmetic number, because the mean of its divisors is an integer number (41432266).

Almost surely, 2^82864531 is an apocalyptic number.

82864531 is a deficient number, since it is larger than the sum of its proper divisors (1).

82864531 is an equidigital number, since it uses as much as digits as its factorization.

82864531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 37.

The square root of 82864531 is about 9102.9957156971. The cubic root of 82864531 is about 435.9696184957.

The spelling of 82864531 in words is "eighty-two million, eight hundred sixty-four thousand, five hundred thirty-one".