221261741 has 4 divisors (see below), whose sum is σ = 225012000. Its totient is φ = 217511484.

The previous prime is 221261717. The next prime is 221261767. The reversal of 221261741 is 147162122.

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 not a de Polignac number, because 221261741 - 2²² = 217067437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221261741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221261041) 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, 1875041 + ... + 1875158.

It is an arithmetic number, because the mean of its divisors is an integer number (56253000).

Almost surely, 2^221261741 is an apocalyptic number.

It is an amenable number.

221261741 is a deficient number, since it is larger than the sum of its proper divisors (3750259).

221261741 is an equidigital number, since it uses as much as digits as its factorization.

221261741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750258.

The product of its digits is 1344, while the sum is 26.

The square root of 221261741 is about 14874.8694448052. The cubic root of 221261741 is about 604.8329488925.

The spelling of 221261741 in words is "two hundred twenty-one million, two hundred sixty-one thousand, seven hundred forty-one".