144440161 has 4 divisors (see below), whose sum is σ = 150720192. Its totient is φ = 138160132.

The previous prime is 144440159. The next prime is 144440173. The reversal of 144440161 is 161044441.

It is a happy number.

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: 161044441 = 3547 ⋅45403.

It is a cyclic number.

It is not a de Polignac number, because 144440161 - 2¹ = 144440159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144440111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3139981 + ... + 3140026.

It is an arithmetic number, because the mean of its divisors is an integer number (37680048).

Almost surely, 2^144440161 is an apocalyptic number.

It is an amenable number.

144440161 is a deficient number, since it is larger than the sum of its proper divisors (6280031).

144440161 is an equidigital number, since it uses as much as digits as its factorization.

144440161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6280030.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 144440161 is about 12018.3260481649. The cubic root of 144440161 is about 524.6817856958.

The spelling of 144440161 in words is "one hundred forty-four million, four hundred forty thousand, one hundred sixty-one".