211520051 has 8 divisors (see below), whose sum is σ = 214663680. Its totient is φ = 208388232.

The previous prime is 211520041. The next prime is 211520063. The reversal of 211520051 is 150025112.

211520051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211520051 - 2¹⁴ = 211503667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211520041) 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, 37076 + ... + 42398.

It is an arithmetic number, because the mean of its divisors is an integer number (26832960).

Almost surely, 2^211520051 is an apocalyptic number.

211520051 is a deficient number, since it is larger than the sum of its proper divisors (3143629).

211520051 is an equidigital number, since it uses as much as digits as its factorization.

211520051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5905.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 211520051 is about 14543.7289234914. The cubic root of 211520051 is about 595.8228860911.

Adding to 211520051 its reverse (150025112), we get a palindrome (361545163).

The spelling of 211520051 in words is "two hundred eleven million, five hundred twenty thousand, fifty-one".