11981151 has 24 divisors (see below), whose sum is σ = 21301280. Its totient is φ = 6319296.

The previous prime is 11981131. The next prime is 11981161. The reversal of 11981151 is 15118911.

It is not a de Polignac number, because 11981151 - 2⁶ = 11981087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11981131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6496 + ... + 8133.

Almost surely, 2^11981151 is an apocalyptic number.

11981151 is a deficient number, since it is larger than the sum of its proper divisors (9320129).

11981151 is a wasteful number, since it uses less digits than its factorization.

11981151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14655 (or 14652 counting only the distinct ones).

The product of its digits is 360, while the sum is 27.

The square root of 11981151 is about 3461.3799271389. The cubic root of 11981151 is about 228.8229150338.

The spelling of 11981151 in words is "eleven million, nine hundred eighty-one thousand, one hundred fifty-one".