155150022161 has 2 divisors, whose sum is σ = 155150022162. Its totient is φ = 155150022160.

The previous prime is 155150022067. The next prime is 155150022169. The reversal of 155150022161 is 161220051551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132409382161 + 22740640000 = 363881^2 + 150800^2 .

It is a cyclic number.

It is not a de Polignac number, because 155150022161 - 2³⁴ = 137970152977 is a prime.

It is a super-2 number, since 2×155150022161² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (155150022169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77575011080 + 77575011081.

It is an arithmetic number, because the mean of its divisors is an integer number (77575011081).

Almost surely, 2^155150022161 is an apocalyptic number.

It is an amenable number.

155150022161 is a deficient number, since it is larger than the sum of its proper divisors (1).

155150022161 is an equidigital number, since it uses as much as digits as its factorization.

155150022161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 29.

The spelling of 155150022161 in words is "one hundred fifty-five billion, one hundred fifty million, twenty-two thousand, one hundred sixty-one".