1220331503 has 8 divisors (see below), whose sum is σ = 1257009936. Its totient is φ = 1183982400.

The previous prime is 1220331491. The next prime is 1220331557. The reversal of 1220331503 is 3051330221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220331503 - 2⁶ = 1220331439 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 (1220339503) 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 7 ways as a sum of consecutive naturals, for example, 74801 + ... + 89642.

It is an arithmetic number, because the mean of its divisors is an integer number (157126242).

Almost surely, 2^1220331503 is an apocalyptic number.

1220331503 is a deficient number, since it is larger than the sum of its proper divisors (36678433).

1220331503 is a wasteful number, since it uses less digits than its factorization.

1220331503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164665.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 1220331503 is about 34933.2435224672. The cubic root of 1220331503 is about 1068.6265030266.

Adding to 1220331503 its reverse (3051330221), we get a palindrome (4271661724).

The spelling of 1220331503 in words is "one billion, two hundred twenty million, three hundred thirty-one thousand, five hundred three".