211950801 has 6 divisors (see below), whose sum is σ = 306151170. Its totient is φ = 141300528.

The previous prime is 211950799. The next prime is 211950811. The reversal of 211950801 is 108059112.

It can be written as a sum of positive squares in only one way, i.e., 122080401 + 89870400 = 11049^2 + 9480^2 .

It is not a de Polignac number, because 211950801 - 2¹ = 211950799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211950811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11775036 + ... + 11775053.

It is an arithmetic number, because the mean of its divisors is an integer number (51025195).

Almost surely, 2^211950801 is an apocalyptic number.

It is an amenable number.

211950801 is a deficient number, since it is larger than the sum of its proper divisors (94200369).

211950801 is a wasteful number, since it uses less digits than its factorization.

211950801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23550095 (or 23550092 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 211950801 is about 14558.5301799323. The cubic root of 211950801 is about 596.2270663489.

The spelling of 211950801 in words is "two hundred eleven million, nine hundred fifty thousand, eight hundred one".