118381511 has 2 divisors, whose sum is σ = 118381512. Its totient is φ = 118381510.

The previous prime is 118381507. The next prime is 118381547. The reversal of 118381511 is 115183811.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (115183811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118381511 - 2² = 118381507 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118381811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59190755 + 59190756.

It is an arithmetic number, because the mean of its divisors is an integer number (59190756).

Almost surely, 2^118381511 is an apocalyptic number.

118381511 is a deficient number, since it is larger than the sum of its proper divisors (1).

118381511 is an equidigital number, since it uses as much as digits as its factorization.

118381511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 29.

The square root of 118381511 is about 10880.3267873718. The cubic root of 118381511 is about 491.0148493317.

The spelling of 118381511 in words is "one hundred eighteen million, three hundred eighty-one thousand, five hundred eleven".