221772253 has 2 divisors, whose sum is σ = 221772254. Its totient is φ = 221772252.

The previous prime is 221772227. The next prime is 221772277. The reversal of 221772253 is 352277122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144648729 + 77123524 = 12027^2 + 8782^2 .

It is a cyclic number.

It is not a de Polignac number, because 221772253 - 2⁹ = 221771741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221772203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110886126 + 110886127.

It is an arithmetic number, because the mean of its divisors is an integer number (110886127).

Almost surely, 2^221772253 is an apocalyptic number.

It is an amenable number.

221772253 is a deficient number, since it is larger than the sum of its proper divisors (1).

221772253 is an equidigital number, since it uses as much as digits as its factorization.

221772253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 31.

The square root of 221772253 is about 14892.0197757054. The cubic root of 221772253 is about 605.2977638592.

The spelling of 221772253 in words is "two hundred twenty-one million, seven hundred seventy-two thousand, two hundred fifty-three".