220526989 has 2 divisors, whose sum is σ = 220526990. Its totient is φ = 220526988.

The previous prime is 220526981. The next prime is 220527001. The reversal of 220526989 is 989625022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220522500 + 4489 = 14850^2 + 67^2 .

It is a cyclic number.

It is not a de Polignac number, because 220526989 - 2³ = 220526981 is a prime.

It is a super-2 number, since 2×220526989² = 97264305754812242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220526981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110263494 + 110263495.

It is an arithmetic number, because the mean of its divisors is an integer number (110263495).

Almost surely, 2^220526989 is an apocalyptic number.

It is an amenable number.

220526989 is a deficient number, since it is larger than the sum of its proper divisors (1).

220526989 is an equidigital number, since it uses as much as digits as its factorization.

220526989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 220526989 is about 14850.1511440120. The cubic root of 220526989 is about 604.1627094427.

The spelling of 220526989 in words is "two hundred twenty million, five hundred twenty-six thousand, nine hundred eighty-nine".