216319425 has 24 divisors (see below), whose sum is σ = 408741696. Its totient is φ = 98888640.

The previous prime is 216319421. The next prime is 216319469. The reversal of 216319425 is 524913612.

It is not a de Polignac number, because 216319425 - 2² = 216319421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216319421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205494 + ... + 206543.

It is an arithmetic number, because the mean of its divisors is an integer number (17030904).

Almost surely, 2^216319425 is an apocalyptic number.

216319425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216319425 is a deficient number, since it is larger than the sum of its proper divisors (192422271).

216319425 is a wasteful number, since it uses less digits than its factorization.

216319425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412057 (or 412052 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 216319425 is about 14707.8015012442. The cubic root of 216319425 is about 600.2956182148.

The spelling of 216319425 in words is "two hundred sixteen million, three hundred nineteen thousand, four hundred twenty-five".