1020222225 has 36 divisors (see below), whose sum is σ = 1993457232. Its totient is φ = 494652000.

The previous prime is 1020222211. The next prime is 1020222227. The reversal of 1020222225 is 5222220201.

It is not a de Polignac number, because 1020222225 - 2⁵ = 1020222193 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1020222198 and 1020222207.

It is not an unprimeable number, because it can be changed into a prime (1020222227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 203631 + ... + 208580.

It is an arithmetic number, because the mean of its divisors is an integer number (55373812).

Almost surely, 2^1020222225 is an apocalyptic number.

1020222225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020222225 is a deficient number, since it is larger than the sum of its proper divisors (973235007).

1020222225 is a wasteful number, since it uses less digits than its factorization.

1020222225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412238 (or 412230 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1020222225 is about 31940.9177231964. The cubic root of 1020222225 is about 1006.6958077589.

Adding to 1020222225 its reverse (5222220201), we get a palindrome (6242442426).

The spelling of 1020222225 in words is "one billion, twenty million, two hundred twenty-two thousand, two hundred twenty-five".