219991492 has 48 divisors (see below), whose sum is σ = 478493568. Its totient is φ = 86330880.

The previous prime is 219991489. The next prime is 219991501. The reversal of 219991492 is 294199912.

219991492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

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, 11367 + ... + 23857.

It is an arithmetic number, because the mean of its divisors is an integer number (9968616).

Almost surely, 2^219991492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 219991492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239246784).

219991492 is an abundant number, since it is smaller than the sum of its proper divisors (258502076).

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

219991492 is a wasteful number, since it uses less digits than its factorization.

219991492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12556 (or 12554 counting only the distinct ones).

The product of its digits is 104976, while the sum is 46.

The square root of 219991492 is about 14832.1101667969. The cubic root of 219991492 is about 603.6732915816.

The spelling of 219991492 in words is "two hundred nineteen million, nine hundred ninety-one thousand, four hundred ninety-two".