144261431 has 16 divisors (see below), whose sum is σ = 151873920. Its totient is φ = 136903200.

The previous prime is 144261427. The next prime is 144261443. The reversal of 144261431 is 134162441.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 144261431 - 2² = 144261427 is a prime.

It is a super-2 number, since 2×144261431² = 41622720948335522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144261431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144261731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255956 + ... + 256518.

It is an arithmetic number, because the mean of its divisors is an integer number (9492120).

Almost surely, 2^144261431 is an apocalyptic number.

144261431 is a deficient number, since it is larger than the sum of its proper divisors (7612489).

144261431 is a wasteful number, since it uses less digits than its factorization.

144261431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766.

The product of its digits is 2304, while the sum is 26.

The square root of 144261431 is about 12010.8880187936. Note that the first 3 decimals coincide. The cubic root of 144261431 is about 524.4652829330.

The spelling of 144261431 in words is "one hundred forty-four million, two hundred sixty-one thousand, four hundred thirty-one".