11711551 has 2 divisors, whose sum is σ = 11711552. Its totient is φ = 11711550.

The previous prime is 11711519. The next prime is 11711561. The reversal of 11711551 is 15511711.

It is a strong prime.

It is an emirp because it is prime and its reverse (15511711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11711551 - 2⁵ = 11711519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11711501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5855775 + 5855776.

It is an arithmetic number, because the mean of its divisors is an integer number (5855776).

Almost surely, 2^11711551 is an apocalyptic number.

11711551 is a deficient number, since it is larger than the sum of its proper divisors (1).

11711551 is an equidigital number, since it uses as much as digits as its factorization.

11711551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 175, while the sum is 22.

The square root of 11711551 is about 3422.2143416215. The cubic root of 11711551 is about 227.0935527502.

The spelling of 11711551 in words is "eleven million, seven hundred eleven thousand, five hundred fifty-one".