64340225 has 12 divisors (see below), whose sum is σ = 81939324. Its totient is φ = 50080320.

The previous prime is 64340209. The next prime is 64340231. The reversal of 64340225 is 52204346.

It can be written as a sum of positive squares in 6 ways, for example, as 2686321 + 61653904 = 1639^2 + 7852^2 .

It is not a de Polignac number, because 64340225 - 2⁴ = 64340209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64340194 and 64340203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33854 + ... + 35703.

It is an arithmetic number, because the mean of its divisors is an integer number (6828277).

Almost surely, 2^64340225 is an apocalyptic number.

It is an amenable number.

64340225 is a deficient number, since it is larger than the sum of its proper divisors (17599099).

64340225 is a wasteful number, since it uses less digits than its factorization.

64340225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69604 (or 69599 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 64340225 is about 8021.2358773446. The cubic root of 64340225 is about 400.7075497787.

The spelling of 64340225 in words is "sixty-four million, three hundred forty thousand, two hundred twenty-five".