82263781 has 2 divisors, whose sum is σ = 82263782. Its totient is φ = 82263780.

The previous prime is 82263767. The next prime is 82263803. The reversal of 82263781 is 18736228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81180100 + 1083681 = 9010^2 + 1041^2 .

It is a cyclic number.

It is not a de Polignac number, because 82263781 - 2¹⁵ = 82231013 is a prime.

It is a super-2 number, since 2×82263781² = 13534659328831922, 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 82263781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82263721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41131890 + 41131891.

It is an arithmetic number, because the mean of its divisors is an integer number (41131891).

Almost surely, 2^82263781 is an apocalyptic number.

It is an amenable number.

82263781 is a deficient number, since it is larger than the sum of its proper divisors (1).

82263781 is an equidigital number, since it uses as much as digits as its factorization.

82263781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 82263781 is about 9069.9383129104. The cubic root of 82263781 is about 434.9135002182.

The spelling of 82263781 in words is "eighty-two million, two hundred sixty-three thousand, seven hundred eighty-one".