219540868 has 12 divisors (see below), whose sum is σ = 385245952. Its totient is φ = 109470600.

The previous prime is 219540851. The next prime is 219540887. The reversal of 219540868 is 868045912.

It is a happy number.

219540868 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73308 + ... + 76243.

Almost surely, 2^219540868 is an apocalyptic number.

It is an amenable number.

219540868 is a deficient number, since it is larger than the sum of its proper divisors (165705084).

219540868 is a wasteful number, since it uses less digits than its factorization.

219540868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149922 (or 149920 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 219540868 is about 14816.9115540318. The cubic root of 219540868 is about 603.2608277151.

The spelling of 219540868 in words is "two hundred nineteen million, five hundred forty thousand, eight hundred sixty-eight".