822518149 has 2 divisors, whose sum is σ = 822518150. Its totient is φ = 822518148.

The previous prime is 822518141. The next prime is 822518159. The reversal of 822518149 is 941815228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 728622049 + 93896100 = 26993^2 + 9690^2 .

It is a cyclic number.

It is not a de Polignac number, because 822518149 - 2³ = 822518141 is a prime.

It is a super-2 number, since 2×822518149² = 1353072210868772402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (822518141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411259074 + 411259075.

It is an arithmetic number, because the mean of its divisors is an integer number (411259075).

Almost surely, 2^822518149 is an apocalyptic number.

It is an amenable number.

822518149 is a deficient number, since it is larger than the sum of its proper divisors (1).

822518149 is an equidigital number, since it uses as much as digits as its factorization.

822518149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 40.

The square root of 822518149 is about 28679.5772109702. The cubic root of 822518149 is about 936.9472981364.

The spelling of 822518149 in words is "eight hundred twenty-two million, five hundred eighteen thousand, one hundred forty-nine".