1153221505 has 16 divisors (see below), whose sum is σ = 1416320640. Its totient is φ = 901191808.

The previous prime is 1153221499. The next prime is 1153221521. The reversal of 1153221505 is 5051223511.

It is a cyclic number.

It is not a de Polignac number, because 1153221505 - 2¹⁵ = 1153188737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1153221505.

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 15 ways as a sum of consecutive naturals, for example, 21324 + ... + 52546.

It is an arithmetic number, because the mean of its divisors is an integer number (88520040).

Almost surely, 2^1153221505 is an apocalyptic number.

It is an amenable number.

1153221505 is a deficient number, since it is larger than the sum of its proper divisors (263099135).

1153221505 is an equidigital number, since it uses as much as digits as its factorization.

1153221505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31400.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1153221505 is about 33959.1151975431. The cubic root of 1153221505 is about 1048.6669417019. Note that the first 3 decimals are identical.

The spelling of 1153221505 in words is "one billion, one hundred fifty-three million, two hundred twenty-one thousand, five hundred five".