181282113731 has 2 divisors, whose sum is σ = 181282113732. Its totient is φ = 181282113730.

The previous prime is 181282113721. The next prime is 181282113863. The reversal of 181282113731 is 137311282181.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181282113731 is a prime.

It is a super-2 number, since 2×181282113731² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (181282113721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90641056865 + 90641056866.

It is an arithmetic number, because the mean of its divisors is an integer number (90641056866).

Almost surely, 2^181282113731 is an apocalyptic number.

181282113731 is a deficient number, since it is larger than the sum of its proper divisors (1).

181282113731 is an equidigital number, since it uses as much as digits as its factorization.

181282113731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 38.

The spelling of 181282113731 in words is "one hundred eighty-one billion, two hundred eighty-two million, one hundred thirteen thousand, seven hundred thirty-one".