219990285 has 48 divisors (see below), whose sum is σ = 421334784. Its totient is φ = 105616896.

The previous prime is 219990247. The next prime is 219990293. The reversal of 219990285 is 582099912.

It is not a de Polignac number, because 219990285 - 2⁹ = 219989773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 219990285.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 11344 + ... + 23846.

It is an arithmetic number, because the mean of its divisors is an integer number (8777808).

Almost surely, 2^219990285 is an apocalyptic number.

It is an amenable number.

219990285 is a deficient number, since it is larger than the sum of its proper divisors (201344499).

219990285 is a wasteful number, since it uses less digits than its factorization.

219990285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12554 (or 12551 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 219990285 is about 14832.0694779926. The cubic root of 219990285 is about 603.6721875465.

The spelling of 219990285 in words is "two hundred nineteen million, nine hundred ninety thousand, two hundred eighty-five".