144185431 has 4 divisors (see below), whose sum is σ = 155276632. Its totient is φ = 133094232.

The previous prime is 144185423. The next prime is 144185467. The reversal of 144185431 is 134581441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134581441 = 23 ⋅5851367.

It is a cyclic number.

It is not a de Polignac number, because 144185431 - 2³ = 144185423 is a prime.

It is a super-2 number, since 2×144185431² = 41578877025311522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144185393 and 144185402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144185491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5545581 + ... + 5545606.

It is an arithmetic number, because the mean of its divisors is an integer number (38819158).

Almost surely, 2^144185431 is an apocalyptic number.

144185431 is a deficient number, since it is larger than the sum of its proper divisors (11091201).

144185431 is a wasteful number, since it uses less digits than its factorization.

144185431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11091200.

The product of its digits is 7680, while the sum is 31.

The square root of 144185431 is about 12007.7238059509. The cubic root of 144185431 is about 524.3731669209.

The spelling of 144185431 in words is "one hundred forty-four million, one hundred eighty-five thousand, four hundred thirty-one".