143231131 has 4 divisors (see below), whose sum is σ = 143378712. Its totient is φ = 143083552.

The previous prime is 143231093. The next prime is 143231149. The reversal of 143231131 is 131132341.

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

It is a cyclic number.

It is not a de Polignac number, because 143231131 - 2¹⁷ = 143100059 is a prime.

It is a super-2 number, since 2×143231131² = 41030313775078322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143231099 and 143231108.

It is not an unprimeable number, because it can be changed into a prime (143231161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72325 + ... + 74278.

It is an arithmetic number, because the mean of its divisors is an integer number (35844678).

Almost surely, 2^143231131 is an apocalyptic number.

143231131 is a deficient number, since it is larger than the sum of its proper divisors (147581).

143231131 is an equidigital number, since it uses as much as digits as its factorization.

143231131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147580.

The product of its digits is 216, while the sum is 19.

The square root of 143231131 is about 11967.9209138430. The cubic root of 143231131 is about 523.2137400553.

Adding to 143231131 its reverse (131132341), we get a palindrome (274363472).

The spelling of 143231131 in words is "one hundred forty-three million, two hundred thirty-one thousand, one hundred thirty-one".