144415231 has 4 divisors (see below), whose sum is σ = 145222200. Its totient is φ = 143608264.

The previous prime is 144415213. The next prime is 144415247. The reversal of 144415231 is 132514441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144415231 is a prime.

It is a super-2 number, since 2×144415231² = 41711517889566722, 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 = 144415196 and 144415205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144415211) 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, 403216 + ... + 403573.

It is an arithmetic number, because the mean of its divisors is an integer number (36305550).

Almost surely, 2^144415231 is an apocalyptic number.

144415231 is a deficient number, since it is larger than the sum of its proper divisors (806969).

144415231 is an equidigital number, since it uses as much as digits as its factorization.

144415231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806968.

The product of its digits is 1920, while the sum is 25.

The square root of 144415231 is about 12017.2888373376. The cubic root of 144415231 is about 524.6515977170.

Adding to 144415231 its reverse (132514441), we get a palindrome (276929672).

The spelling of 144415231 in words is "one hundred forty-four million, four hundred fifteen thousand, two hundred thirty-one".