82205531 has 2 divisors, whose sum is σ = 82205532. Its totient is φ = 82205530.

The previous prime is 82205509. The next prime is 82205549. The reversal of 82205531 is 13550228.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82205531 - 2¹⁴ = 82189147 is a prime.

It is a super-2 number, since 2×82205531² = 13515498653983922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82205531.

It is not a weakly prime, because it can be changed into another prime (82205561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41102765 + 41102766.

It is an arithmetic number, because the mean of its divisors is an integer number (41102766).

Almost surely, 2^82205531 is an apocalyptic number.

82205531 is a deficient number, since it is larger than the sum of its proper divisors (1).

82205531 is an equidigital number, since it uses as much as digits as its factorization.

82205531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 82205531 is about 9066.7265868118. The cubic root of 82205531 is about 434.8108236294.

Adding to 82205531 its reverse (13550228), we get a palindrome (95755759).

The spelling of 82205531 in words is "eighty-two million, two hundred five thousand, five hundred thirty-one".