221023019 has 8 divisors (see below), whose sum is σ = 252695520. Its totient is φ = 189374976.

The previous prime is 221023013. The next prime is 221023037. The reversal of 221023019 is 910320122.

221023019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 221023019 - 2⁴ = 221023003 is a prime.

It is a super-2 number, since 2×221023019² = 97702349855748722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221023013) 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, 21707 + ... + 30219.

It is an arithmetic number, because the mean of its divisors is an integer number (31586940).

Almost surely, 2^221023019 is an apocalyptic number.

221023019 is a deficient number, since it is larger than the sum of its proper divisors (31672501).

221023019 is an equidigital number, since it uses as much as digits as its factorization.

221023019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12229.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 221023019 is about 14866.8429399116. The cubic root of 221023019 is about 604.6153500604.

The spelling of 221023019 in words is "two hundred twenty-one million, twenty-three thousand, nineteen".