221271741 has 12 divisors (see below), whose sum is σ = 322444668. Its totient is φ = 146208384.

The previous prime is 221271703. The next prime is 221271749. The reversal of 221271741 is 147172122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 32319225 + 188952516 = 5685^2 + 13746^2 .

It is not a de Polignac number, because 221271741 - 2²⁷ = 87054013 is a prime.

It is a super-2 number, since 2×221271741² = 97922366730342162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221271749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107770 + ... + 109803.

It is an arithmetic number, because the mean of its divisors is an integer number (26870389).

Almost surely, 2^221271741 is an apocalyptic number.

It is an amenable number.

221271741 is a deficient number, since it is larger than the sum of its proper divisors (101172927).

221271741 is a wasteful number, since it uses less digits than its factorization.

221271741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217692 (or 217689 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 221271741 is about 14875.2055784113. The cubic root of 221271741 is about 604.8420606325.

The spelling of 221271741 in words is "two hundred twenty-one million, two hundred seventy-one thousand, seven hundred forty-one".