211500649 has 2 divisors, whose sum is σ = 211500650. Its totient is φ = 211500648.

The previous prime is 211500629. The next prime is 211500659. The reversal of 211500649 is 946005112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138227049 + 73273600 = 11757^2 + 8560^2 .

It is a cyclic number.

It is not a de Polignac number, because 211500649 - 2⁹ = 211500137 is a prime.

It is not a weakly prime, because it can be changed into another prime (211500629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105750324 + 105750325.

It is an arithmetic number, because the mean of its divisors is an integer number (105750325).

Almost surely, 2^211500649 is an apocalyptic number.

It is an amenable number.

211500649 is a deficient number, since it is larger than the sum of its proper divisors (1).

211500649 is an equidigital number, since it uses as much as digits as its factorization.

211500649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 211500649 is about 14543.0618853115. The cubic root of 211500649 is about 595.8046679457.

The spelling of 211500649 in words is "two hundred eleven million, five hundred thousand, six hundred forty-nine".