221149079 has 4 divisors (see below), whose sum is σ = 221390640. Its totient is φ = 220907520.

The previous prime is 221149067. The next prime is 221149127. The reversal of 221149079 is 970941122.

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 221149079 - 2¹² = 221144983 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 (221145079) 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, 119402 + ... + 121239.

It is an arithmetic number, because the mean of its divisors is an integer number (55347660).

Almost surely, 2^221149079 is an apocalyptic number.

221149079 is a deficient number, since it is larger than the sum of its proper divisors (241561).

221149079 is an equidigital number, since it uses as much as digits as its factorization.

221149079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241560.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 221149079 is about 14871.0819713967. The cubic root of 221149079 is about 604.7302752323.

The spelling of 221149079 in words is "two hundred twenty-one million, one hundred forty-nine thousand, seventy-nine".