210540055 has 32 divisors (see below), whose sum is σ = 281304576. Its totient is φ = 150000000.

The previous prime is 210540049. The next prime is 210540059. The reversal of 210540055 is 550045012.

It is not a de Polignac number, because 210540055 - 2¹¹ = 210538007 is a prime.

It is a super-2 number, since 2×210540055² = 88654229518806050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210540059) 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 31 ways as a sum of consecutive naturals, for example, 838680 + ... + 838930.

It is an arithmetic number, because the mean of its divisors is an integer number (8790768).

Almost surely, 2^210540055 is an apocalyptic number.

210540055 is a deficient number, since it is larger than the sum of its proper divisors (70764521).

210540055 is a wasteful number, since it uses less digits than its factorization.

210540055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 210540055 is about 14509.9984493452. The cubic root of 210540055 is about 594.9012900299.

Adding to 210540055 its reverse (550045012), we get a palindrome (760585067).

The spelling of 210540055 in words is "two hundred ten million, five hundred forty thousand, fifty-five".