221455341 has 12 divisors (see below), whose sum is σ = 321539868. Its totient is φ = 146870784.

The previous prime is 221455321. The next prime is 221455343. The reversal of 221455341 is 143554122.

It can be written as a sum of positive squares in 2 ways, for example, as 93199716 + 128255625 = 9654^2 + 11325^2 .

It is not a de Polignac number, because 221455341 - 2¹⁵ = 221422573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221455343) 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, 62010 + ... + 65483.

It is an arithmetic number, because the mean of its divisors is an integer number (26794989).

Almost surely, 2^221455341 is an apocalyptic number.

It is an amenable number.

221455341 is a deficient number, since it is larger than the sum of its proper divisors (100084527).

221455341 is a wasteful number, since it uses less digits than its factorization.

221455341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127692 (or 127689 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 221455341 is about 14881.3756420568. The cubic root of 221455341 is about 605.0093034109.

The spelling of 221455341 in words is "two hundred twenty-one million, four hundred fifty-five thousand, three hundred forty-one".