219949218 has 24 divisors (see below), whose sum is σ = 476946288. Its totient is φ = 73256472.

The previous prime is 219949211. The next prime is 219949241. The reversal of 219949218 is 812949912.

It is not an unprimeable number, because it can be changed into a prime (219949211) by changing a digit.

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, 21405 + ... + 29967.

It is an arithmetic number, because the mean of its divisors is an integer number (19872762).

Almost surely, 2^219949218 is an apocalyptic number.

219949218 is an abundant number, since it is smaller than the sum of its proper divisors (256997070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

219949218 is a wasteful number, since it uses less digits than its factorization.

219949218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9998 (or 9995 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 219949218 is about 14830.6850145231. The cubic root of 219949218 is about 603.6346214202.

The spelling of 219949218 in words is "two hundred nineteen million, nine hundred forty-nine thousand, two hundred eighteen".