221156341 has 4 divisors (see below), whose sum is σ = 252750112. Its totient is φ = 189562572.

The previous prime is 221156329. The next prime is 221156381. The reversal of 221156341 is 143651122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221156341 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 (221156311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15796875 + ... + 15796888.

It is an arithmetic number, because the mean of its divisors is an integer number (63187528).

Almost surely, 2^221156341 is an apocalyptic number.

It is an amenable number.

221156341 is a deficient number, since it is larger than the sum of its proper divisors (31593771).

221156341 is an equidigital number, since it uses as much as digits as its factorization.

221156341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31593770.

The product of its digits is 1440, while the sum is 25.

The square root of 221156341 is about 14871.3261345450. The cubic root of 221156341 is about 604.7368944523.

The spelling of 221156341 in words is "two hundred twenty-one million, one hundred fifty-six thousand, three hundred forty-one".