1153553281 has 2 divisors, whose sum is σ = 1153553282. Its totient is φ = 1153553280.

The previous prime is 1153553279. The next prime is 1153553333. The reversal of 1153553281 is 1823553511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1042967025 + 110586256 = 32295^2 + 10516^2 .

It is a cyclic number.

It is not a de Polignac number, because 1153553281 - 2¹ = 1153553279 is a prime.

It is a super-2 number, since 2×1153553281² = 2661370344211729922, which contains 22 as substring.

Together with 1153553279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1153523281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576776640 + 576776641.

It is an arithmetic number, because the mean of its divisors is an integer number (576776641).

Almost surely, 2^1153553281 is an apocalyptic number.

It is an amenable number.

1153553281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1153553281 is an equidigital number, since it uses as much as digits as its factorization.

1153553281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 34.

The square root of 1153553281 is about 33963.9997791780. Note that the first 3 decimals coincide. The cubic root of 1153553281 is about 1048.7674974528.

The spelling of 1153553281 in words is "one billion, one hundred fifty-three million, five hundred fifty-three thousand, two hundred eighty-one".