1153221455 has 8 divisors (see below), whose sum is σ = 1384048032. Its totient is φ = 922455648.

The previous prime is 1153221437. The next prime is 1153221463. The reversal of 1153221455 is 5541223511.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1153221455 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66689 + ... + 82181.

It is an arithmetic number, because the mean of its divisors is an integer number (173006004).

Almost surely, 2^1153221455 is an apocalyptic number.

1153221455 is a deficient number, since it is larger than the sum of its proper divisors (230826577).

1153221455 is a wasteful number, since it uses less digits than its factorization.

1153221455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30385.

The product of its digits is 6000, while the sum is 29.

The square root of 1153221455 is about 33959.1144613637. The cubic root of 1153221455 is about 1048.6669265463. Note that the first 3 decimals are identical.

Adding to 1153221455 its reverse (5541223511), we get a palindrome (6694444966).

The spelling of 1153221455 in words is "one billion, one hundred fifty-three million, two hundred twenty-one thousand, four hundred fifty-five".