144778231 has 8 divisors (see below), whose sum is σ = 156147264. Its totient is φ = 133442400.

The previous prime is 144778219. The next prime is 144778241. The reversal of 144778231 is 132877441.

144778231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 144778231 - 2¹¹ = 144776183 is a prime.

It is a super-2 number, since 2×144778231² = 41921472342978722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144778211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1170 + ... + 17056.

It is an arithmetic number, because the mean of its divisors is an integer number (19518408).

Almost surely, 2^144778231 is an apocalyptic number.

144778231 is a deficient number, since it is larger than the sum of its proper divisors (11369033).

144778231 is a wasteful number, since it uses less digits than its factorization.

144778231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16601.

The product of its digits is 37632, while the sum is 37.

The square root of 144778231 is about 12032.3825986377. The cubic root of 144778231 is about 525.0908154310.

The spelling of 144778231 in words is "one hundred forty-four million, seven hundred seventy-eight thousand, two hundred thirty-one".