221350253 has 2 divisors, whose sum is σ = 221350254. Its totient is φ = 221350252.

The previous prime is 221350231. The next prime is 221350271. The reversal of 221350253 is 352053122.

221350253 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., 217916644 + 3433609 = 14762^2 + 1853^2 .

It is a cyclic number.

It is not a de Polignac number, because 221350253 - 2²⁶ = 154241389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221350223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110675126 + 110675127.

It is an arithmetic number, because the mean of its divisors is an integer number (110675127).

Almost surely, 2^221350253 is an apocalyptic number.

It is an amenable number.

221350253 is a deficient number, since it is larger than the sum of its proper divisors (1).

221350253 is an equidigital number, since it uses as much as digits as its factorization.

221350253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 221350253 is about 14877.8443667085. The cubic root of 221350253 is about 604.9135891887.

The spelling of 221350253 in words is "two hundred twenty-one million, three hundred fifty thousand, two hundred fifty-three".