219821094 has 16 divisors (see below), whose sum is σ = 488491440. Its totient is φ = 73273680.

The previous prime is 219821087. The next prime is 219821111. The reversal of 219821094 is 490128912.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2035327 + ... + 2035434.

It is an arithmetic number, because the mean of its divisors is an integer number (30530715).

Almost surely, 2^219821094 is an apocalyptic number.

219821094 is an abundant number, since it is smaller than the sum of its proper divisors (268670346).

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

219821094 is a wasteful number, since it uses less digits than its factorization.

219821094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070772 (or 4070766 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 219821094 is about 14826.3648275631. The cubic root of 219821094 is about 603.5173896563.

The spelling of 219821094 in words is "two hundred nineteen million, eight hundred twenty-one thousand, ninety-four".