211620240484 has 27 divisors (see below), whose sum is σ = 376054854777. Its totient is φ = 104200503264.

The previous prime is 211620240449. The next prime is 211620240493. The reversal of 211620240484 is 484042026112.

The square root of 211620240484 is 460022.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 70039622500 + 141580617984 = 264650^2 + 376272^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 61641232 + ... + 61644664.

Almost surely, 2^211620240484 is an apocalyptic number.

211620240484 is the 460022-nd square number.

It is an amenable number.

211620240484 is a deficient number, since it is larger than the sum of its proper divisors (164434614293).

211620240484 is an frugal number, since it uses more digits than its factorization.

211620240484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7004 (or 3502 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 34.

Adding to 211620240484 its reverse (484042026112), we get a palindrome (695662266596).

The spelling of 211620240484 in words is "two hundred eleven billion, six hundred twenty million, two hundred forty thousand, four hundred eighty-four".