219942489 has 32 divisors (see below), whose sum is σ = 329190400. Its totient is φ = 129703680.

The previous prime is 219942487. The next prime is 219942509. The reversal of 219942489 is 984249912.

It is not a de Polignac number, because 219942489 - 2¹ = 219942487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219942487) 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 31 ways as a sum of consecutive naturals, for example, 130947 + ... + 132615.

It is an arithmetic number, because the mean of its divisors is an integer number (10287200).

Almost surely, 2^219942489 is an apocalyptic number.

It is an amenable number.

219942489 is a deficient number, since it is larger than the sum of its proper divisors (109247911).

219942489 is a wasteful number, since it uses less digits than its factorization.

219942489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825.

The product of its digits is 373248, while the sum is 48.

The square root of 219942489 is about 14830.4581520599. The cubic root of 219942489 is about 603.6284656071.

The spelling of 219942489 in words is "two hundred nineteen million, nine hundred forty-two thousand, four hundred eighty-nine".