221154061 has 2 divisors, whose sum is σ = 221154062. Its totient is φ = 221154060.

The previous prime is 221154019. The next prime is 221154067. The reversal of 221154061 is 160451122.

221154061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164994025 + 56160036 = 12845^2 + 7494^2 .

It is a cyclic number.

It is not a de Polignac number, because 221154061 - 2¹¹ = 221152013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221154067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110577030 + 110577031.

It is an arithmetic number, because the mean of its divisors is an integer number (110577031).

Almost surely, 2^221154061 is an apocalyptic number.

It is an amenable number.

221154061 is a deficient number, since it is larger than the sum of its proper divisors (1).

221154061 is an equidigital number, since it uses as much as digits as its factorization.

221154061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 221154061 is about 14871.2494767588. The cubic root of 221154061 is about 604.7348162771.

The spelling of 221154061 in words is "two hundred twenty-one million, one hundred fifty-four thousand, sixty-one".