1220773553 has 8 divisors (see below), whose sum is σ = 1348783488. Its totient is φ = 1099008064.

The previous prime is 1220773549. The next prime is 1220773559. The reversal of 1220773553 is 3553770221.

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 1220773553 - 2² = 1220773549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1220773559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1560701 + ... + 1561482.

It is an arithmetic number, because the mean of its divisors is an integer number (168597936).

Almost surely, 2^1220773553 is an apocalyptic number.

It is an amenable number.

1220773553 is a deficient number, since it is larger than the sum of its proper divisors (128009935).

1220773553 is a wasteful number, since it uses less digits than its factorization.

1220773553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3122223.

The product of its (nonzero) digits is 44100, while the sum is 35.

The square root of 1220773553 is about 34939.5700173886. The cubic root of 1220773553 is about 1068.7555196961.

The spelling of 1220773553 in words is "one billion, two hundred twenty million, seven hundred seventy-three thousand, five hundred fifty-three".