1153440221 has 8 divisors (see below), whose sum is σ = 1164568704. Its totient is φ = 1142359920.

The previous prime is 1153440203. The next prime is 1153440241. The reversal of 1153440221 is 1220443511.

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-1153440221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153440241) 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, 37016 + ... + 60638.

It is an arithmetic number, because the mean of its divisors is an integer number (145571088).

Almost surely, 2^1153440221 is an apocalyptic number.

It is an amenable number.

1153440221 is a deficient number, since it is larger than the sum of its proper divisors (11128483).

1153440221 is a wasteful number, since it uses less digits than its factorization.

1153440221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24091.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1153440221 is about 33962.3353290082. The cubic root of 1153440221 is about 1048.7332330256.

Adding to 1153440221 its reverse (1220443511), we get a palindrome (2373883732).

The spelling of 1153440221 in words is "one billion, one hundred fifty-three million, four hundred forty thousand, two hundred twenty-one".