221452501 has 2 divisors, whose sum is σ = 221452502. Its totient is φ = 221452500.

The previous prime is 221452477. The next prime is 221452507. The reversal of 221452501 is 105254122.

221452501 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., 180875601 + 40576900 = 13449^2 + 6370^2 .

It is a cyclic number.

It is not a de Polignac number, because 221452501 - 2⁷ = 221452373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221452507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110726250 + 110726251.

It is an arithmetic number, because the mean of its divisors is an integer number (110726251).

Almost surely, 2^221452501 is an apocalyptic number.

It is an amenable number.

221452501 is a deficient number, since it is larger than the sum of its proper divisors (1).

221452501 is an equidigital number, since it uses as much as digits as its factorization.

221452501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 221452501 is about 14881.2802204649. The cubic root of 221452501 is about 605.0067171351.

The spelling of 221452501 in words is "two hundred twenty-one million, four hundred fifty-two thousand, five hundred one".