143144765421 has 16 divisors (see below), whose sum is σ = 218248162944. Its totient is φ = 81750956544.

The previous prime is 143144765377. The next prime is 143144765459. The reversal of 143144765421 is 124567441341.

It is a happy number.

It is not a de Polignac number, because 143144765421 - 2²² = 143140571117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143144765471) 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, 1880640 + ... + 1955273.

It is an arithmetic number, because the mean of its divisors is an integer number (13640510184).

Almost surely, 2^143144765421 is an apocalyptic number.

It is an amenable number.

143144765421 is a deficient number, since it is larger than the sum of its proper divisors (75103397523).

143144765421 is a wasteful number, since it uses less digits than its factorization.

143144765421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837700.

The product of its digits is 322560, while the sum is 42.

The spelling of 143144765421 in words is "one hundred forty-three billion, one hundred forty-four million, seven hundred sixty-five thousand, four hundred twenty-one".