211023454441 has 6 divisors (see below), whose sum is σ = 211212794490. Its totient is φ = 210834283968.

The previous prime is 211023454427. The next prime is 211023454483. The reversal of 211023454441 is 144454320112.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 152727766416 + 58295688025 = 390804^2 + 241445^2 .

It is not a de Polignac number, because 211023454441 - 2⁹ = 211023453929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211023454141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1177465 + ... + 1344793.

It is an arithmetic number, because the mean of its divisors is an integer number (35202132415).

Almost surely, 2^211023454441 is an apocalyptic number.

It is an amenable number.

211023454441 is a deficient number, since it is larger than the sum of its proper divisors (189340049).

211023454441 is an frugal number, since it uses more digits than its factorization.

211023454441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169575 (or 168452 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 211023454441 its reverse (144454320112), we get a palindrome (355477774553).

The spelling of 211023454441 in words is "two hundred eleven billion, twenty-three million, four hundred fifty-four thousand, four hundred forty-one".