1153243553 has 32 divisors (see below), whose sum is σ = 1460222208. Its totient is φ = 884736000.

The previous prime is 1153243543. The next prime is 1153243571. The reversal of 1153243553 is 3553423511.

It is a cyclic number.

It is not a de Polignac number, because 1153243553 - 2⁶ = 1153243489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1153243523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1998401 + ... + 1998977.

It is an arithmetic number, because the mean of its divisors is an integer number (45631944).

Almost surely, 2^1153243553 is an apocalyptic number.

It is an amenable number.

1153243553 is a deficient number, since it is larger than the sum of its proper divisors (306978655).

1153243553 is a wasteful number, since it uses less digits than its factorization.

1153243553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953.

The product of its digits is 27000, while the sum is 32.

The square root of 1153243553 is about 33959.4398216461. The cubic root of 1153243553 is about 1048.6736246797.

The spelling of 1153243553 in words is "one billion, one hundred fifty-three million, two hundred forty-three thousand, five hundred fifty-three".