180820151 has 2 divisors, whose sum is σ = 180820152. Its totient is φ = 180820150.

The previous prime is 180820141. The next prime is 180820163. The reversal of 180820151 is 151028081.

It is a weak prime.

It is an emirp because it is prime and its reverse (151028081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180820151 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 180820151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180820111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90410075 + 90410076.

It is an arithmetic number, because the mean of its divisors is an integer number (90410076).

Almost surely, 2^180820151 is an apocalyptic number.

180820151 is a deficient number, since it is larger than the sum of its proper divisors (1).

180820151 is an equidigital number, since it uses as much as digits as its factorization.

180820151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 180820151 is about 13446.9383504201. The cubic root of 180820151 is about 565.4778644427.

The spelling of 180820151 in words is "one hundred eighty million, eight hundred twenty thousand, one hundred fifty-one".