820122610 has 32 divisors (see below), whose sum is σ = 1530524160. Its totient is φ = 316032192.

The previous prime is 820122557. The next prime is 820122637. The reversal of 820122610 is 16221028.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138327 + ... + 144133.

It is an arithmetic number, because the mean of its divisors is an integer number (47828880).

Almost surely, 2^820122610 is an apocalyptic number.

820122610 is a deficient number, since it is larger than the sum of its proper divisors (710401550).

820122610 is a wasteful number, since it uses less digits than its factorization.

820122610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6330.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 820122610 is about 28637.7829099950. The cubic root of 820122610 is about 936.0368111086.

Adding to 820122610 its reverse (16221028), we get a palindrome (836343638).

The spelling of 820122610 in words is "eight hundred twenty million, one hundred twenty-two thousand, six hundred ten".