221044413151 has 4 divisors (see below), whose sum is σ = 223323221632. Its totient is φ = 218765604672.

The previous prime is 221044413127. The next prime is 221044413179. The reversal of 221044413151 is 151314440122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221044413151 - 2⁹ = 221044412639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221044413251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1139404095 + ... + 1139404288.

It is an arithmetic number, because the mean of its divisors is an integer number (55830805408).

Almost surely, 2^221044413151 is an apocalyptic number.

221044413151 is a deficient number, since it is larger than the sum of its proper divisors (2278808481).

221044413151 is an equidigital number, since it uses as much as digits as its factorization.

221044413151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278808480.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 221044413151 its reverse (151314440122), we get a palindrome (372358853273).

The spelling of 221044413151 in words is "two hundred twenty-one billion, forty-four million, four hundred thirteen thousand, one hundred fifty-one".