201822669 has 6 divisors (see below), whose sum is σ = 291521646. Its totient is φ = 134548440.

The previous prime is 201822659. The next prime is 201822689. The reversal of 201822669 is 966228102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 200590569 + 1232100 = 14163^2 + 1110^2 .

It is not a de Polignac number, because 201822669 - 2¹³ = 201814477 is a prime.

It is a super-2 number, since 2×201822669² = 81464779444567122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201822619) 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 in 5 ways as a sum of consecutive naturals, for example, 11212362 + ... + 11212379.

It is an arithmetic number, because the mean of its divisors is an integer number (48586941).

Almost surely, 2^201822669 is an apocalyptic number.

It is an amenable number.

201822669 is a deficient number, since it is larger than the sum of its proper divisors (89698977).

201822669 is a wasteful number, since it uses less digits than its factorization.

201822669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22424747 (or 22424744 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 201822669 is about 14206.4305509864. The cubic root of 201822669 is about 586.5746836605.

The spelling of 201822669 in words is "two hundred one million, eight hundred twenty-two thousand, six hundred sixty-nine".