211145650 has 24 divisors (see below), whose sum is σ = 405402624. Its totient is φ = 81733200.

The previous prime is 211145617. The next prime is 211145653. The reversal of 211145650 is 56541112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (211145653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66562 + ... + 69661.

It is an arithmetic number, because the mean of its divisors is an integer number (16891776).

Almost surely, 2^211145650 is an apocalyptic number.

211145650 is a deficient number, since it is larger than the sum of its proper divisors (194256974).

211145650 is a wasteful number, since it uses less digits than its factorization.

211145650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136266 (or 136261 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 211145650 is about 14530.8516612069. The cubic root of 211145650 is about 595.4711330983.

Adding to 211145650 its reverse (56541112), we get a palindrome (267686762).

The spelling of 211145650 in words is "two hundred eleven million, one hundred forty-five thousand, six hundred fifty".