151220161 has 2 divisors, whose sum is σ = 151220162. Its totient is φ = 151220160.

The previous prime is 151220149. The next prime is 151220203. The reversal of 151220161 is 161022151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77792400 + 73427761 = 8820^2 + 8569^2 .

It is a cyclic number.

It is not a de Polignac number, because 151220161 - 2¹⁷ = 151089089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (151227161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75610080 + 75610081.

It is an arithmetic number, because the mean of its divisors is an integer number (75610081).

Almost surely, 2^151220161 is an apocalyptic number.

It is an amenable number.

151220161 is a deficient number, since it is larger than the sum of its proper divisors (1).

151220161 is an equidigital number, since it uses as much as digits as its factorization.

151220161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 151220161 is about 12297.1606885492. The cubic root of 151220161 is about 532.7660786077.

The spelling of 151220161 in words is "one hundred fifty-one million, two hundred twenty thousand, one hundred sixty-one".