211234645 has 16 divisors (see below), whose sum is σ = 265191552. Its totient is φ = 161219520.

The previous prime is 211234613. The next prime is 211234679. The reversal of 211234645 is 546432112.

It is not a de Polignac number, because 211234645 - 2⁵ = 211234613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46234 + ... + 50596.

It is an arithmetic number, because the mean of its divisors is an integer number (16574472).

Almost surely, 2^211234645 is an apocalyptic number.

It is an amenable number.

211234645 is a deficient number, since it is larger than the sum of its proper divisors (53956907).

211234645 is a wasteful number, since it uses less digits than its factorization.

211234645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4812.

The product of its digits is 5760, while the sum is 28.

The square root of 211234645 is about 14533.9136160912. The cubic root of 211234645 is about 595.5547823231.

Adding to 211234645 its reverse (546432112), we get a palindrome (757666757).

The spelling of 211234645 in words is "two hundred eleven million, two hundred thirty-four thousand, six hundred forty-five".