150561161 has 4 divisors (see below), whose sum is σ = 150958800. Its totient is φ = 150163524.

The previous prime is 150561133. The next prime is 150561179. The reversal of 150561161 is 161165051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161165051 = 1163 ⋅138577.

It is a cyclic number.

It is not a de Polignac number, because 150561161 - 2¹⁴ = 150544777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 150561161.

It is not an unprimeable number, because it can be changed into a prime (150561121) 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 in 3 ways as a sum of consecutive naturals, for example, 198251 + ... + 199008.

It is an arithmetic number, because the mean of its divisors is an integer number (37739700).

Almost surely, 2^150561161 is an apocalyptic number.

It is an amenable number.

150561161 is a deficient number, since it is larger than the sum of its proper divisors (397639).

150561161 is an equidigital number, since it uses as much as digits as its factorization.

150561161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397638.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 150561161 is about 12270.3366294491. The cubic root of 150561161 is about 531.9910406560.

The spelling of 150561161 in words is "one hundred fifty million, five hundred sixty-one thousand, one hundred sixty-one".