144318731 has 4 divisors (see below), whose sum is σ = 144559464. Its totient is φ = 144078000.

The previous prime is 144318719. The next prime is 144318739. The reversal of 144318731 is 137813441.

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

It is a cyclic number.

It is not a de Polignac number, because 144318731 - 2⁶ = 144318667 is a prime.

It is a super-2 number, since 2×144318731² = 41655792234900722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144318739) 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, 119465 + ... + 120666.

It is an arithmetic number, because the mean of its divisors is an integer number (36139866).

Almost surely, 2^144318731 is an apocalyptic number.

144318731 is a deficient number, since it is larger than the sum of its proper divisors (240733).

144318731 is an equidigital number, since it uses as much as digits as its factorization.

144318731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240732.

The product of its digits is 8064, while the sum is 32.

The square root of 144318731 is about 12013.2731176811. The cubic root of 144318731 is about 524.5347121689.

The spelling of 144318731 in words is "one hundred forty-four million, three hundred eighteen thousand, seven hundred thirty-one".