11391151 has 2 divisors, whose sum is σ = 11391152. Its totient is φ = 11391150.

The previous prime is 11391119. The next prime is 11391157. The reversal of 11391151 is 15119311.

It is a strong prime.

It is an emirp because it is prime and its reverse (15119311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11391151 - 2⁵ = 11391119 is a prime.

It is a super-2 number, since 2×11391151² = 259516642209602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11391157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5695575 + 5695576.

It is an arithmetic number, because the mean of its divisors is an integer number (5695576).

Almost surely, 2^11391151 is an apocalyptic number.

11391151 is a deficient number, since it is larger than the sum of its proper divisors (1).

11391151 is an equidigital number, since it uses as much as digits as its factorization.

11391151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135, while the sum is 22.

The square root of 11391151 is about 3375.0779250263. The cubic root of 11391151 is about 225.0034633212.

The spelling of 11391151 in words is "eleven million, three hundred ninety-one thousand, one hundred fifty-one".