181131652147 has 2 divisors, whose sum is σ = 181131652148. Its totient is φ = 181131652146.

The previous prime is 181131652123. The next prime is 181131652171. The reversal of 181131652147 is 741256131181.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (181131652123) and next prime (181131652171).

It is an emirp because it is prime and its reverse (741256131181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 181131652147 - 2¹⁵ = 181131619379 is a prime.

It is not a weakly prime, because it can be changed into another prime (181131653147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90565826073 + 90565826074.

It is an arithmetic number, because the mean of its divisors is an integer number (90565826074).

Almost surely, 2^181131652147 is an apocalyptic number.

181131652147 is a deficient number, since it is larger than the sum of its proper divisors (1).

181131652147 is an equidigital number, since it uses as much as digits as its factorization.

181131652147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 40.

The spelling of 181131652147 in words is "one hundred eighty-one billion, one hundred thirty-one million, six hundred fifty-two thousand, one hundred forty-seven".