143440445 has 4 divisors (see below), whose sum is σ = 172128540. Its totient is φ = 114752352.

The previous prime is 143440439. The next prime is 143440447. The reversal of 143440445 is 544044341.

143440445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 59644729 + 83795716 = 7723^2 + 9154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143440445 is a prime.

It is a super-2 number, since 2×143440445² = 41150322523596050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143440447) 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, 14344040 + ... + 14344049.

It is an arithmetic number, because the mean of its divisors is an integer number (43032135).

Almost surely, 2^143440445 is an apocalyptic number.

It is an amenable number.

143440445 is a deficient number, since it is larger than the sum of its proper divisors (28688095).

143440445 is an equidigital number, since it uses as much as digits as its factorization.

143440445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28688094.

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 143440445 is about 11976.6625150749. The cubic root of 143440445 is about 523.4684860160.

Adding to 143440445 its reverse (544044341), we get a palindrome (687484786).

The spelling of 143440445 in words is "one hundred forty-three million, four hundred forty thousand, four hundred forty-five".