1153233021 has 8 divisors (see below), whose sum is σ = 1537874944. Its totient is φ = 768706560.

The previous prime is 1153233013. The next prime is 1153233047. The reversal of 1153233021 is 1203323511.

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

It is not a de Polignac number, because 1153233021 - 2³ = 1153233013 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 (1153233071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1981 + ... + 48066.

It is an arithmetic number, because the mean of its divisors is an integer number (192234368).

Almost surely, 2^1153233021 is an apocalyptic number.

It is an amenable number.

1153233021 is a deficient number, since it is larger than the sum of its proper divisors (384641923).

1153233021 is an equidigital number, since it uses as much as digits as its factorization.

1153233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57731.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1153233021 is about 33959.2847539520. The cubic root of 1153233021 is about 1048.6704323317.

Adding to 1153233021 its reverse (1203323511), we get a palindrome (2356556532).

The spelling of 1153233021 in words is "one billion, one hundred fifty-three million, two hundred thirty-three thousand, twenty-one".