143145331 has 4 divisors (see below), whose sum is σ = 163594672. Its totient is φ = 122695992.

The previous prime is 143145329. The next prime is 143145347. The reversal of 143145331 is 133541341.

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 143145331 - 2¹ = 143145329 is a prime.

It is a super-2 number, since 2×143145331² = 40981171574199122, 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 = 143145296 and 143145305.

It is not an unprimeable number, because it can be changed into a prime (143145311) 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, 10224660 + ... + 10224673.

It is an arithmetic number, because the mean of its divisors is an integer number (40898668).

Almost surely, 2^143145331 is an apocalyptic number.

143145331 is a deficient number, since it is larger than the sum of its proper divisors (20449341).

143145331 is an equidigital number, since it uses as much as digits as its factorization.

143145331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20449340.

The product of its digits is 2160, while the sum is 25.

The square root of 143145331 is about 11964.3357943515. The cubic root of 143145331 is about 523.1092453005.

Adding to 143145331 its reverse (133541341), we get a palindrome (276686672).

The spelling of 143145331 in words is "one hundred forty-three million, one hundred forty-five thousand, three hundred thirty-one".