1563220373 has 16 divisors (see below), whose sum is σ = 1837757376. Its totient is φ = 1310903040.

The previous prime is 1563220357. The next prime is 1563220381. The reversal of 1563220373 is 3730223651.

It is a cyclic number.

It is not a de Polignac number, because 1563220373 - 2⁴ = 1563220357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1563220073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287165 + ... + 292557.

It is an arithmetic number, because the mean of its divisors is an integer number (114859836).

Almost surely, 2^1563220373 is an apocalyptic number.

1563220373 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1563220373 is a deficient number, since it is larger than the sum of its proper divisors (274537003).

1563220373 is a wasteful number, since it uses less digits than its factorization.

1563220373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7444.

The product of its (nonzero) digits is 22680, while the sum is 32.

The square root of 1563220373 is about 39537.5817798712. The cubic root of 1563220373 is about 1160.5755103525.

The spelling of 1563220373 in words is "one billion, five hundred sixty-three million, two hundred twenty thousand, three hundred seventy-three".