1153243221 has 16 divisors (see below), whose sum is σ = 1674550080. Its totient is φ = 701712000.

The previous prime is 1153243219. The next prime is 1153243237. The reversal of 1153243221 is 1223423511.

It is not a de Polignac number, because 1153243221 - 2¹ = 1153243219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1153243191 and 1153243200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153243291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162655 + ... + 169596.

It is an arithmetic number, because the mean of its divisors is an integer number (104659380).

Almost surely, 2^1153243221 is an apocalyptic number.

It is an amenable number.

1153243221 is a deficient number, since it is larger than the sum of its proper divisors (521306859).

1153243221 is a wasteful number, since it uses less digits than its factorization.

1153243221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332356.

The product of its digits is 1440, while the sum is 24.

The square root of 1153243221 is about 33959.4349334614. The cubic root of 1153243221 is about 1048.6735240477.

Adding to 1153243221 its reverse (1223423511), we get a palindrome (2376666732).

The spelling of 1153243221 in words is "one billion, one hundred fifty-three million, two hundred forty-three thousand, two hundred twenty-one".