1109889225 has 27 divisors (see below), whose sum is σ = 1988830389. Its totient is φ = 591674400.

The previous prime is 1109889223. The next prime is 1109889227. The reversal of 1109889225 is 5229889011.

The square root of 1109889225 is 33315.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (1109889223) and next prime (1109889227).

It can be written as a sum of positive squares in 4 ways, for example, as 1798281 + 1108090944 = 1341^2 + 33288^2 .

It is not a de Polignac number, because 1109889225 - 2¹ = 1109889223 is a prime.

It is a super-2 number, since 2×1109889225² = 2463708183542201250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1109889223) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 498615 + ... + 500835.

Almost surely, 2^1109889225 is an apocalyptic number.

1109889225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1109889225 is the 33315-th square number.

1109889225 is the 16658-th centered octagonal number.

It is an amenable number.

1109889225 is a deficient number, since it is larger than the sum of its proper divisors (878941164).

1109889225 is an frugal number, since it uses more digits than its factorization.

1109889225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4458 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The cubic root of 1109889225 is about 1035.3643609684.

The spelling of 1109889225 in words is "one billion, one hundred nine million, eight hundred eighty-nine thousand, two hundred twenty-five".