143420331 has 4 divisors (see below), whose sum is σ = 191227112. Its totient is φ = 95613552.

The previous prime is 143420323. The next prime is 143420357. The reversal of 143420331 is 133024341.

143420331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 143420331 - 2³ = 143420323 is a prime.

It is a super-2 number, since 2×143420331² = 41138782688299122, 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 = 143420298 and 143420307.

It is not an unprimeable number, because it can be changed into a prime (143420311) 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, 23903386 + ... + 23903391.

It is an arithmetic number, because the mean of its divisors is an integer number (47806778).

Almost surely, 2^143420331 is an apocalyptic number.

143420331 is a deficient number, since it is larger than the sum of its proper divisors (47806781).

143420331 is an equidigital number, since it uses as much as digits as its factorization.

143420331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47806780.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 143420331 is about 11975.8227692297. The cubic root of 143420331 is about 523.4440170054. Note that the first 3 decimals are identical.

Adding to 143420331 its reverse (133024341), we get a palindrome (276444672).

The spelling of 143420331 in words is "one hundred forty-three million, four hundred twenty thousand, three hundred thirty-one".