1353221555 has 8 divisors (see below), whose sum is σ = 1855846752. Its totient is φ = 927923328.

The previous prime is 1353221531. The next prime is 1353221561. The reversal of 1353221555 is 5551223531.

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 1353221555 - 2⁸ = 1353221299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 19331702 + ... + 19331771.

It is an arithmetic number, because the mean of its divisors is an integer number (231980844).

Almost surely, 2^1353221555 is an apocalyptic number.

1353221555 is a deficient number, since it is larger than the sum of its proper divisors (502625197).

1353221555 is an equidigital number, since it uses as much as digits as its factorization.

1353221555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38663485.

The product of its digits is 22500, while the sum is 32.

The square root of 1353221555 is about 36786.1598294793. The cubic root of 1353221555 is about 1106.0878852954.

The spelling of 1353221555 in words is "one billion, three hundred fifty-three million, two hundred twenty-one thousand, five hundred fifty-five".