144552731 has 4 divisors (see below), whose sum is σ = 144750672. Its totient is φ = 144354792.

The previous prime is 144552719. The next prime is 144552781. The reversal of 144552731 is 137255441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137255441 = 43 ⋅3191987.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144552731 is a prime.

It is a super-2 number, since 2×144552731² = 41790984079116722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144552781) 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, 97871 + ... + 99336.

It is an arithmetic number, because the mean of its divisors is an integer number (36187668).

Almost surely, 2^144552731 is an apocalyptic number.

144552731 is a deficient number, since it is larger than the sum of its proper divisors (197941).

144552731 is an equidigital number, since it uses as much as digits as its factorization.

144552731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197940.

The product of its digits is 16800, while the sum is 32.

The square root of 144552731 is about 12023.0084005626. The cubic root of 144552731 is about 524.8180545633.

The spelling of 144552731 in words is "one hundred forty-four million, five hundred fifty-two thousand, seven hundred thirty-one".