211000051 has 2 divisors, whose sum is σ = 211000052. Its totient is φ = 211000050.

The previous prime is 211000033. The next prime is 211000109. The reversal of 211000051 is 150000112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211000051 - 2⁷ = 210999923 is a prime.

It is not a weakly prime, because it can be changed into another prime (211000021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105500025 + 105500026.

It is an arithmetic number, because the mean of its divisors is an integer number (105500026).

Almost surely, 2^211000051 is an apocalyptic number.

211000051 is a deficient number, since it is larger than the sum of its proper divisors (1).

211000051 is an equidigital number, since it uses as much as digits as its factorization.

211000051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 211000051 is about 14525.8408018262. The cubic root of 211000051 is about 595.3342292792.

Adding to 211000051 its reverse (150000112), we get a palindrome (361000163).

The spelling of 211000051 in words is "two hundred eleven million, fifty-one", and thus it is an aban number.