211255649 has 8 divisors (see below), whose sum is σ = 233618592. Its totient is φ = 189419040.

The previous prime is 211255643. The next prime is 211255673. The reversal of 211255649 is 946552112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211255649 - 2⁸ = 211255393 is a prime.

It is a super-2 number, since 2×211255649² = 89257898468822402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211255643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130739 + ... + 132344.

It is an arithmetic number, because the mean of its divisors is an integer number (29202324).

Almost surely, 2^211255649 is an apocalyptic number.

It is an amenable number.

211255649 is a deficient number, since it is larger than the sum of its proper divisors (22362943).

211255649 is a wasteful number, since it uses less digits than its factorization.

211255649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263167.

The product of its digits is 21600, while the sum is 35.

The square root of 211255649 is about 14534.6361839573. The cubic root of 211255649 is about 595.5745212223.

The spelling of 211255649 in words is "two hundred eleven million, two hundred fifty-five thousand, six hundred forty-nine".