144443651515231 has 4 divisors (see below), whose sum is σ = 146891848998600. Its totient is φ = 141995454031864.

The previous prime is 144443651515169. The next prime is 144443651515237. The reversal of 144443651515231 is 132515156344441.

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-144443651515231 is a prime.

It is a super-2 number, since 2×144443651515231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144443651515237) 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, 1224098741596 + ... + 1224098741713.

It is an arithmetic number, because the mean of its divisors is an integer number (36722962249650).

Almost surely, 2^{144443651515231} is an apocalyptic number.

144443651515231 is a deficient number, since it is larger than the sum of its proper divisors (2448197483369).

144443651515231 is an equidigital number, since it uses as much as digits as its factorization.

144443651515231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448197483368.

The product of its digits is 3456000, while the sum is 49.

The spelling of 144443651515231 in words is "one hundred forty-four trillion, four hundred forty-three billion, six hundred fifty-one million, five hundred fifteen thousand, two hundred thirty-one".