253664225 has 12 divisors (see below), whose sum is σ = 333046764. Its totient is φ = 190993920.

The previous prime is 253664221. The next prime is 253664233. The reversal of 253664225 is 522466352.

It can be written as a sum of positive squares in 6 ways, for example, as 7268416 + 246395809 = 2696^2 + 15697^2 .

It is not a de Polignac number, because 253664225 - 2² = 253664221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253664221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 298004 + ... + 298853.

It is an arithmetic number, because the mean of its divisors is an integer number (27753897).

Almost surely, 2^253664225 is an apocalyptic number.

253664225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

253664225 is a deficient number, since it is larger than the sum of its proper divisors (79382539).

253664225 is a wasteful number, since it uses less digits than its factorization.

253664225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596884 (or 596879 counting only the distinct ones).

The product of its digits is 86400, while the sum is 35.

The square root of 253664225 is about 15926.8397681398. The cubic root of 253664225 is about 633.0233655555.

The spelling of 253664225 in words is "two hundred fifty-three million, six hundred sixty-four thousand, two hundred twenty-five".