221148069 has 8 divisors (see below), whose sum is σ = 297904320. Its totient is φ = 145911936.

The previous prime is 221148047. The next prime is 221148071. The reversal of 221148069 is 960841122.

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

It is not a de Polignac number, because 221148069 - 2¹¹ = 221146021 is a prime.

It is a super-2 number, since 2×221148069² = 97812936844857522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221148569) 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, 379689 + ... + 380270.

It is an arithmetic number, because the mean of its divisors is an integer number (37238040).

Almost surely, 2^221148069 is an apocalyptic number.

It is an amenable number.

221148069 is a deficient number, since it is larger than the sum of its proper divisors (76756251).

221148069 is an equidigital number, since it uses as much as digits as its factorization.

221148069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760059.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 221148069 is about 14871.0480128335. The cubic root of 221148069 is about 604.7293546188.

The spelling of 221148069 in words is "two hundred twenty-one million, one hundred forty-eight thousand, sixty-nine".