211403320253 has 2 divisors, whose sum is σ = 211403320254. Its totient is φ = 211403320252.

The previous prime is 211403320243. The next prime is 211403320267. The reversal of 211403320253 is 352023304112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201347843524 + 10055476729 = 448718^2 + 100277^2 .

It is a cyclic number.

It is not a de Polignac number, because 211403320253 - 2⁴ = 211403320237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211403320243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105701660126 + 105701660127.

It is an arithmetic number, because the mean of its divisors is an integer number (105701660127).

Almost surely, 2^211403320253 is an apocalyptic number.

It is an amenable number.

211403320253 is a deficient number, since it is larger than the sum of its proper divisors (1).

211403320253 is an equidigital number, since it uses as much as digits as its factorization.

211403320253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 211403320253 its reverse (352023304112), we get a palindrome (563426624365).

The spelling of 211403320253 in words is "two hundred eleven billion, four hundred three million, three hundred twenty thousand, two hundred fifty-three".