1220545016 has 16 divisors (see below), whose sum is σ = 2289330000. Its totient is φ = 610057024.

The previous prime is 1220544917. The next prime is 1220545019. The reversal of 1220545016 is 6105450221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220545019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1445 + ... + 49428.

It is an arithmetic number, because the mean of its divisors is an integer number (143083125).

Almost surely, 2^1220545016 is an apocalyptic number.

It is an amenable number.

1220545016 is a deficient number, since it is larger than the sum of its proper divisors (1068784984).

1220545016 is a wasteful number, since it uses less digits than its factorization.

1220545016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53878 (or 53874 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1220545016 is about 34936.2994033426. The cubic root of 1220545016 is about 1068.6888227991.

Adding to 1220545016 its reverse (6105450221), we get a palindrome (7325995237).

The spelling of 1220545016 in words is "one billion, two hundred twenty million, five hundred forty-five thousand, sixteen".