221253089 has 2 divisors, whose sum is σ = 221253090. Its totient is φ = 221253088.

The previous prime is 221253073. The next prime is 221253121. The reversal of 221253089 is 980352122.

It is a happy number.

It is an a-pointer prime, because the next prime (221253121) can be obtained adding 221253089 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208947025 + 12306064 = 14455^2 + 3508^2 .

It is a cyclic number.

It is not a de Polignac number, because 221253089 - 2⁴ = 221253073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221253029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110626544 + 110626545.

It is an arithmetic number, because the mean of its divisors is an integer number (110626545).

Almost surely, 2^221253089 is an apocalyptic number.

It is an amenable number.

221253089 is a deficient number, since it is larger than the sum of its proper divisors (1).

221253089 is an equidigital number, since it uses as much as digits as its factorization.

221253089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 221253089 is about 14874.5786158802. The cubic root of 221253089 is about 604.8250651935.

The spelling of 221253089 in words is "two hundred twenty-one million, two hundred fifty-three thousand, eighty-nine".