211621030 has 16 divisors (see below), whose sum is σ = 381393360. Its totient is φ = 84542752.

The previous prime is 211621027. The next prime is 211621043. The reversal of 211621030 is 30126112.

It is a junction number, because it is equal to n+sod(n) for n = 211620995 and 211621013.

It is a congruent number.

It is an unprimeable number.

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, 4525 + ... + 21064.

It is an arithmetic number, because the mean of its divisors is an integer number (23837085).

Almost surely, 2^211621030 is an apocalyptic number.

211621030 is a deficient number, since it is larger than the sum of its proper divisors (169772330).

211621030 is a wasteful number, since it uses less digits than its factorization.

211621030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26423.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 211621030 is about 14547.2000742411. The cubic root of 211621030 is about 595.9176856576.

Adding to 211621030 its reverse (30126112), we get a palindrome (241747142).

The spelling of 211621030 in words is "two hundred eleven million, six hundred twenty-one thousand, thirty".