147143231 has 4 divisors (see below), whose sum is σ = 147674712. Its totient is φ = 146611752.

The previous prime is 147143209. The next prime is 147143237. The reversal of 147143231 is 132341741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132341741 = 7 ⋅18905963.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147143231 is a prime.

It is a super-2 number, since 2×147143231² = 43302260858238722, which contains 22 as substring.

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 147143231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147143237) 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, 265325 + ... + 265878.

It is an arithmetic number, because the mean of its divisors is an integer number (36918678).

Almost surely, 2^147143231 is an apocalyptic number.

147143231 is a deficient number, since it is larger than the sum of its proper divisors (531481).

147143231 is an equidigital number, since it uses as much as digits as its factorization.

147143231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531480.

The product of its digits is 2016, while the sum is 26.

The square root of 147143231 is about 12130.2609617436. The cubic root of 147143231 is about 527.9345636977.

Adding to 147143231 its reverse (132341741), we get a palindrome (279484972).

The spelling of 147143231 in words is "one hundred forty-seven million, one hundred forty-three thousand, two hundred thirty-one".