210516949 has 4 divisors (see below), whose sum is σ = 215412736. Its totient is φ = 205621164.

The previous prime is 210516931. The next prime is 210516959. The reversal of 210516949 is 949615012.

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 210516949 - 2⁷ = 210516821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210516959) 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, 2447829 + ... + 2447914.

It is an arithmetic number, because the mean of its divisors is an integer number (53853184).

Almost surely, 2^210516949 is an apocalyptic number.

It is an amenable number.

210516949 is a deficient number, since it is larger than the sum of its proper divisors (4895787).

210516949 is an equidigital number, since it uses as much as digits as its factorization.

210516949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4895786.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 210516949 is about 14509.2022179030. The cubic root of 210516949 is about 594.8795264878.

The spelling of 210516949 in words is "two hundred ten million, five hundred sixteen thousand, nine hundred forty-nine".