143431405 has 16 divisors (see below), whose sum is σ = 185968944. Its totient is φ = 105569280.

The previous prime is 143431403. The next prime is 143431429. The reversal of 143431405 is 504134341.

143431405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 20620681 + 122810724 = 4541^2 + 11082^2 .

It is not a de Polignac number, because 143431405 - 2¹ = 143431403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 143431405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143431403) 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, 17125 + ... + 24085.

It is an arithmetic number, because the mean of its divisors is an integer number (11623059).

Almost surely, 2^143431405 is an apocalyptic number.

It is an amenable number.

143431405 is a deficient number, since it is larger than the sum of its proper divisors (42537539).

143431405 is a wasteful number, since it uses less digits than its factorization.

143431405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7296.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 143431405 is about 11976.2851084967. The cubic root of 143431405 is about 523.4574889909.

Adding to 143431405 its reverse (504134341), we get a palindrome (647565746).

The spelling of 143431405 in words is "one hundred forty-three million, four hundred thirty-one thousand, four hundred five".