1151161013 has 4 divisors (see below), whose sum is σ = 1152217248. Its totient is φ = 1150104780.

The previous prime is 1151161009. The next prime is 1151161027. The reversal of 1151161013 is 3101611511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3101611511 = 349 ⋅8887139.

It is a cyclic number.

It is not a de Polignac number, because 1151161013 - 2² = 1151161009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151161043) 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, 526481 + ... + 528662.

It is an arithmetic number, because the mean of its divisors is an integer number (288054312).

Almost surely, 2^1151161013 is an apocalyptic number.

It is an amenable number.

1151161013 is a deficient number, since it is larger than the sum of its proper divisors (1056235).

1151161013 is a wasteful number, since it uses less digits than its factorization.

1151161013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056234.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 1151161013 is about 33928.7638000561. The cubic root of 1151161013 is about 1048.0420088462.

Adding to 1151161013 its reverse (3101611511), we get a palindrome (4252772524).

The spelling of 1151161013 in words is "one billion, one hundred fifty-one million, one hundred sixty-one thousand, thirteen".