1802221210 has 16 divisors (see below), whose sum is σ = 3297179592. Its totient is φ = 709070400.

The previous prime is 1802221181. The next prime is 1802221237. The reversal of 1802221210 is 121222081.

It can be written as a sum of positive squares in 4 ways, for example, as 571544649 + 1230676561 = 23907^2 + 35081^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1476621 + ... + 1477840.

Almost surely, 2^1802221210 is an apocalyptic number.

1802221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1802221210 is a deficient number, since it is larger than the sum of its proper divisors (1494958382).

1802221210 is a wasteful number, since it uses less digits than its factorization.

1802221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954529.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 1802221210 is about 42452.5760113565. The cubic root of 1802221210 is about 1216.9405581749.

Adding to 1802221210 its reverse (121222081), we get a palindrome (1923443291).

The spelling of 1802221210 in words is "one billion, eight hundred two million, two hundred twenty-one thousand, two hundred ten".