1153227161 has 4 divisors (see below), whose sum is σ = 1155751092. Its totient is φ = 1150703232.

The previous prime is 1153227133. The next prime is 1153227193. The reversal of 1153227161 is 1617223511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1617223511 = 241 ⋅6710471.

It can be written as a sum of positive squares in 2 ways, for example, as 806560000 + 346667161 = 28400^2 + 18619^2 .

It is a cyclic number.

It is not a de Polignac number, because 1153227161 - 2¹⁸ = 1152965017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1153227121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1261280 + ... + 1262193.

It is an arithmetic number, because the mean of its divisors is an integer number (288937773).

Almost surely, 2^1153227161 is an apocalyptic number.

It is an amenable number.

1153227161 is a deficient number, since it is larger than the sum of its proper divisors (2523931).

1153227161 is an equidigital number, since it uses as much as digits as its factorization.

1153227161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523930.

The product of its digits is 2520, while the sum is 29.

The square root of 1153227161 is about 33959.1984740512. The cubic root of 1153227161 is about 1048.6686561024.

The spelling of 1153227161 in words is "one billion, one hundred fifty-three million, two hundred twenty-seven thousand, one hundred sixty-one".