211223550253 has 4 divisors (see below), whose sum is σ = 211286436480. Its totient is φ = 211160664028.

The previous prime is 211223550229. The next prime is 211223550287. The reversal of 211223550253 is 352055322112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211223550253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211223550353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31438075 + ... + 31444792.

It is an arithmetic number, because the mean of its divisors is an integer number (52821609120).

Almost surely, 2^211223550253 is an apocalyptic number.

It is an amenable number.

211223550253 is a deficient number, since it is larger than the sum of its proper divisors (62886227).

211223550253 is an equidigital number, since it uses as much as digits as its factorization.

211223550253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62886226.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 211223550253 its reverse (352055322112), we get a palindrome (563278872365).

The spelling of 211223550253 in words is "two hundred eleven billion, two hundred twenty-three million, five hundred fifty thousand, two hundred fifty-three".