1220543013 has 16 divisors (see below), whose sum is σ = 1673898176. Its totient is φ = 790508160.

The previous prime is 1220542997. The next prime is 1220543017. The reversal of 1220543013 is 3103450221.

It is not a de Polignac number, because 1220543013 - 2⁴ = 1220542997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220543017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68745 + ... + 84657.

It is an arithmetic number, because the mean of its divisors is an integer number (104618636).

Almost surely, 2^1220543013 is an apocalyptic number.

It is an amenable number.

1220543013 is a deficient number, since it is larger than the sum of its proper divisors (453355163).

1220543013 is a wasteful number, since it uses less digits than its factorization.

1220543013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16644.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1220543013 is about 34936.2707368717. The cubic root of 1220543013 is about 1068.6882382010.

Adding to 1220543013 its reverse (3103450221), we get a palindrome (4323993234).

The spelling of 1220543013 in words is "one billion, two hundred twenty million, five hundred forty-three thousand, thirteen".