211620054 has 16 divisors (see below), whose sum is σ = 423442800. Its totient is φ = 70506240.

The previous prime is 211620053. The next prime is 211620077. The reversal of 211620054 is 450026112.

211620054 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 211620054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211620053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7422 + ... + 21870.

It is an arithmetic number, because the mean of its divisors is an integer number (26465175).

Almost surely, 2^211620054 is an apocalyptic number.

211620054 is an abundant number, since it is smaller than the sum of its proper divisors (211822746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211620054 is a wasteful number, since it uses less digits than its factorization.

211620054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16895.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 211620054 is about 14547.1665282281. The cubic root of 211620054 is about 595.9167695285.

Adding to 211620054 its reverse (450026112), we get a palindrome (661646166).

The spelling of 211620054 in words is "two hundred eleven million, six hundred twenty thousand, fifty-four".