143031402 has 12 divisors (see below), whose sum is σ = 309901410. Its totient is φ = 47677128.

The previous prime is 143031391. The next prime is 143031407. The reversal of 143031402 is 204130341.

It can be written as a sum of positive squares in only one way, i.e., 129481641 + 13549761 = 11379^2 + 3681^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 7946189 = 143031402 / (1 + 4 + 3 + 0 + 3 + 1 + 4 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (143031407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3973077 + ... + 3973112.

Almost surely, 2^143031402 is an apocalyptic number.

143031402 is an abundant number, since it is smaller than the sum of its proper divisors (166870008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

143031402 is a wasteful number, since it uses less digits than its factorization.

143031402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7946197 (or 7946194 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 143031402 is about 11959.5736546083. The cubic root of 143031402 is about 522.9704280325.

Adding to 143031402 its reverse (204130341), we get a palindrome (347161743).

The spelling of 143031402 in words is "one hundred forty-three million, thirty-one thousand, four hundred two".