1220204522 has 8 divisors (see below), whose sum is σ = 1893420900. Its totient is φ = 589064224.

The previous prime is 1220204473. The next prime is 1220204527. The reversal of 1220204522 is 2254020221.

It can be written as a sum of positive squares in 2 ways, for example, as 1138320121 + 81884401 = 33739^2 + 9049^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1220204522³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220204494 and 1220204503.

It is not an unprimeable number, because it can be changed into a prime (1220204527) 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, 10518947 + ... + 10519062.

Almost surely, 2^1220204522 is an apocalyptic number.

1220204522 is a deficient number, since it is larger than the sum of its proper divisors (673216378).

1220204522 is a wasteful number, since it uses less digits than its factorization.

1220204522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21038040.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1220204522 is about 34931.4259943679. The cubic root of 1220204522 is about 1068.5894366042.

Adding to 1220204522 its reverse (2254020221), we get a palindrome (3474224743).

The spelling of 1220204522 in words is "one billion, two hundred twenty million, two hundred four thousand, five hundred twenty-two".