1220205534 has 8 divisors (see below), whose sum is σ = 2440411080. Its totient is φ = 406735176.

The previous prime is 1220205533. The next prime is 1220205611. The reversal of 1220205534 is 4355020221.

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

1220205534 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220205533) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 101683789 + ... + 101683800.

It is an arithmetic number, because the mean of its divisors is an integer number (305051385).

Almost surely, 2^1220205534 is an apocalyptic number.

1220205534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220205534 is a wasteful number, since it uses less digits than its factorization.

1220205534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203367594.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 1220205534 is about 34931.4404798886. The cubic root of 1220205534 is about 1068.5897320225.

Adding to 1220205534 its reverse (4355020221), we get a palindrome (5575225755).

The spelling of 1220205534 in words is "one billion, two hundred twenty million, two hundred five thousand, five hundred thirty-four".