491598225 has 18 divisors (see below), whose sum is σ = 880507446. Its totient is φ = 262185600.

The previous prime is 491598157. The next prime is 491598253. The reversal of 491598225 is 522895194.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 42497361 + 449100864 = 6519^2 + 21192^2 .

It is not a de Polignac number, because 491598225 - 2⁷ = 491598097 is a prime.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1092216 + ... + 1092665.

Almost surely, 2^491598225 is an apocalyptic number.

491598225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

491598225 is a deficient number, since it is larger than the sum of its proper divisors (388909221).

491598225 is a wasteful number, since it uses less digits than its factorization.

491598225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184897 (or 2184889 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 491598225 is about 22172.0144551640. The cubic root of 491598225 is about 789.2297277628.

The spelling of 491598225 in words is "four hundred ninety-one million, five hundred ninety-eight thousand, two hundred twenty-five".