216313425 has 18 divisors (see below), whose sum is σ = 387441782. Its totient is φ = 115367040.

The previous prime is 216313399. The next prime is 216313439. The reversal of 216313425 is 524313612.

216313425 is a `hidden beast` number, since 2 + 1 + 631 + 3 + 4 + 25 = 666.

216313425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 576081 + 215737344 = 759^2 + 14688^2 .

It is not a de Polignac number, because 216313425 - 2⁵ = 216313393 is a prime.

It is a Duffinian 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, 480472 + ... + 480921.

Almost surely, 2^216313425 is an apocalyptic number.

216313425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216313425 is a deficient number, since it is larger than the sum of its proper divisors (171128357).

216313425 is a wasteful number, since it uses less digits than its factorization.

216313425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961409 (or 961401 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 216313425 is about 14707.5975264487. The cubic root of 216313425 is about 600.2900680783.

The spelling of 216313425 in words is "two hundred sixteen million, three hundred thirteen thousand, four hundred twenty-five".