219040381 has 8 divisors (see below), whose sum is σ = 250988544. Its totient is φ = 187256400.

The previous prime is 219040313. The next prime is 219040399. The reversal of 219040381 is 183040912.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 219040381 - 2²⁷ = 84822653 is a prime.

It is a super-2 number, since 2×219040381² = 95957377017250322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219040301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38170 + ... + 43531.

It is an arithmetic number, because the mean of its divisors is an integer number (31373568).

Almost surely, 2^219040381 is an apocalyptic number.

It is an amenable number.

219040381 is a deficient number, since it is larger than the sum of its proper divisors (31948163).

219040381 is an equidigital number, since it uses as much as digits as its factorization.

219040381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82091.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 219040381 is about 14800.0128716160. The cubic root of 219040381 is about 602.8020613091.

The spelling of 219040381 in words is "two hundred nineteen million, forty thousand, three hundred eighty-one".