143431407 has 24 divisors (see below), whose sum is σ = 242555040. Its totient is φ = 79960320.

The previous prime is 143431403. The next prime is 143431429. The reversal of 143431407 is 704134341.

It is not a de Polignac number, because 143431407 - 2² = 143431403 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 25182 + ... + 30347.

It is an arithmetic number, because the mean of its divisors is an integer number (10106460).

Almost surely, 2^143431407 is an apocalyptic number.

143431407 is a deficient number, since it is larger than the sum of its proper divisors (99123633).

143431407 is a wasteful number, since it uses less digits than its factorization.

143431407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55583 (or 55580 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 143431407 is about 11976.2851919951. The cubic root of 143431407 is about 523.4574914239.

Adding to 143431407 its reverse (704134341), we get a palindrome (847565748).

The spelling of 143431407 in words is "one hundred forty-three million, four hundred thirty-one thousand, four hundred seven".