219091012 has 24 divisors (see below), whose sum is σ = 452318720. Its totient is φ = 90866880.

The previous prime is 219091009. The next prime is 219091021. The reversal of 219091012 is 210190912.

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, 125337 + ... + 127072.

Almost surely, 2^219091012 is an apocalyptic number.

It is an amenable number.

219091012 is an abundant number, since it is smaller than the sum of its proper divisors (233227708).

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

219091012 is a wasteful number, since it uses less digits than its factorization.

219091012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252451 (or 252449 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 219091012 is about 14801.7232780511. The cubic root of 219091012 is about 602.8485034609.

The spelling of 219091012 in words is "two hundred nineteen million, ninety-one thousand, twelve".