4378513225 has 12 divisors (see below), whose sum is σ = 5460745356. Its totient is φ = 3482559680.

The previous prime is 4378513163. The next prime is 4378513241. The reversal of 4378513225 is 5223158734.

It can be written as a sum of positive squares in 6 ways, for example, as 191905609 + 4186607616 = 13853^2 + 64704^2 .

It is not a de Polignac number, because 4378513225 - 2²³ = 4370124617 is a prime.

It is a super-2 number, since 2×4378513225² = 38342756122999801250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 501862 + ... + 510511.

It is an arithmetic number, because the mean of its divisors is an integer number (455062113).

Almost surely, 2^4378513225 is an apocalyptic number.

It is an amenable number.

4378513225 is a deficient number, since it is larger than the sum of its proper divisors (1082232131).

4378513225 is a wasteful number, since it uses less digits than its factorization.

4378513225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012556 (or 1012551 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 4378513225 is about 66170.3349319013. The cubic root of 4378513225 is about 1635.9708281304.

The spelling of 4378513225 in words is "four billion, three hundred seventy-eight million, five hundred thirteen thousand, two hundred twenty-five".