219820225 has 12 divisors (see below), whose sum is σ = 281370880. Its totient is φ = 170182800.

The previous prime is 219820187. The next prime is 219820241. The reversal of 219820225 is 522028912.

It is a de Polignac number, because none of the positive numbers 2^k-219820225 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 141045 + ... + 142594.

Almost surely, 2^219820225 is an apocalyptic number.

219820225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

219820225 is a deficient number, since it is larger than the sum of its proper divisors (61550655).

219820225 is a wasteful number, since it uses less digits than its factorization.

219820225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283680 (or 283675 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 219820225 is about 14826.3355216318. The cubic root of 219820225 is about 603.5165943773.

The spelling of 219820225 in words is "two hundred nineteen million, eight hundred twenty thousand, two hundred twenty-five".