219299994 has 32 divisors (see below), whose sum is σ = 487823040. Its totient is φ = 73026576.

The previous prime is 219299981. The next prime is 219300013. The reversal of 219299994 is 499992912.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 219299994.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91864 + ... + 94220.

It is an arithmetic number, because the mean of its divisors is an integer number (15244470).

Almost surely, 2^219299994 is an apocalyptic number.

219299994 is an abundant number, since it is smaller than the sum of its proper divisors (268523046).

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

219299994 is a wasteful number, since it uses less digits than its factorization.

219299994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4091 (or 4085 counting only the distinct ones).

The product of its digits is 944784, while the sum is 54.

The square root of 219299994 is about 14808.7809761641. The cubic root of 219299994 is about 603.0401200998.

The spelling of 219299994 in words is "two hundred nineteen million, two hundred ninety-nine thousand, nine hundred ninety-four".