221107379 has 4 divisors (see below), whose sum is σ = 221894520. Its totient is φ = 220320240.

The previous prime is 221107363. The next prime is 221107387. The reversal of 221107379 is 973701122.

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 221107379 - 2⁴ = 221107363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221107879) 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, 393149 + ... + 393710.

It is an arithmetic number, because the mean of its divisors is an integer number (55473630).

Almost surely, 2^221107379 is an apocalyptic number.

221107379 is a deficient number, since it is larger than the sum of its proper divisors (787141).

221107379 is an equidigital number, since it uses as much as digits as its factorization.

221107379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787140.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 221107379 is about 14869.6798553298. The cubic root of 221107379 is about 604.6922634113.

The spelling of 221107379 in words is "two hundred twenty-one million, one hundred seven thousand, three hundred seventy-nine".