211057489 has 4 divisors (see below), whose sum is σ = 211095360. Its totient is φ = 211019620.

The previous prime is 211057487. The next prime is 211057513. The reversal of 211057489 is 984750112.

211057489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211057489 - 2¹ = 211057487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211057487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8749 + ... + 22330.

It is an arithmetic number, because the mean of its divisors is an integer number (52773840).

Almost surely, 2^211057489 is an apocalyptic number.

It is an amenable number.

211057489 is a deficient number, since it is larger than the sum of its proper divisors (37871).

211057489 is an equidigital number, since it uses as much as digits as its factorization.

211057489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37870.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 211057489 is about 14527.8177645509. The cubic root of 211057489 is about 595.3882445981.

The spelling of 211057489 in words is "two hundred eleven million, fifty-seven thousand, four hundred eighty-nine".