220001869 has 2 divisors, whose sum is σ = 220001870. Its totient is φ = 220001868.

The previous prime is 220001857. The next prime is 220001897. The reversal of 220001869 is 968100022.

It is a happy number.

It is an a-pointer prime, because the next prime (220001897) can be obtained adding 220001869 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160326244 + 59675625 = 12662^2 + 7725^2 .

It is a cyclic number.

It is not a de Polignac number, because 220001869 - 2¹¹ = 219999821 is a prime.

It is a super-2 number, since 2×220001869² = 96801644726986322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220001809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110000934 + 110000935.

It is an arithmetic number, because the mean of its divisors is an integer number (110000935).

Almost surely, 2^220001869 is an apocalyptic number.

It is an amenable number.

220001869 is a deficient number, since it is larger than the sum of its proper divisors (1).

220001869 is an equidigital number, since it uses as much as digits as its factorization.

220001869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 220001869 is about 14832.4599780347. The cubic root of 220001869 is about 603.6827831900.

The spelling of 220001869 in words is "two hundred twenty million, one thousand, eight hundred sixty-nine".