211017051 has 24 divisors (see below), whose sum is σ = 349090560. Its totient is φ = 120323376.

The previous prime is 211017049. The next prime is 211017067. The reversal of 211017051 is 150710112.

It is a happy number.

It is not a de Polignac number, because 211017051 - 2¹ = 211017049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211017011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28360 + ... + 35018.

It is an arithmetic number, because the mean of its divisors is an integer number (14545440).

Almost surely, 2^211017051 is an apocalyptic number.

211017051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211017051 is a deficient number, since it is larger than the sum of its proper divisors (138073509).

211017051 is a wasteful number, since it uses less digits than its factorization.

211017051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7175 (or 7172 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 211017051 is about 14526.4259541017. The cubic root of 211017051 is about 595.3502172850.

Adding to 211017051 its reverse (150710112), we get a palindrome (361727163).

The spelling of 211017051 in words is "two hundred eleven million, seventeen thousand, fifty-one".