821210049 has 32 divisors (see below), whose sum is σ = 1337402880. Its totient is φ = 493880400.

The previous prime is 821210017. The next prime is 821210059. The reversal of 821210049 is 940012128.

821210049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 821210049 - 2⁵ = 821210017 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (821210059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28354 + ... + 49460.

It is an arithmetic number, because the mean of its divisors is an integer number (41793840).

Almost surely, 2^821210049 is an apocalyptic number.

It is an amenable number.

821210049 is a deficient number, since it is larger than the sum of its proper divisors (516192831).

821210049 is a wasteful number, since it uses less digits than its factorization.

821210049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21258 (or 21252 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 821210049 is about 28656.7627096991. The cubic root of 821210049 is about 936.4503400803.

The spelling of 821210049 in words is "eight hundred twenty-one million, two hundred ten thousand, forty-nine".