320142433 has 4 divisors (see below), whose sum is σ = 344768788. Its totient is φ = 295516080.

The previous prime is 320142409. The next prime is 320142461. The reversal of 320142433 is 334241023.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 49112064 + 271030369 = 7008^2 + 16463^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320142433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320142733) 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, 12313158 + ... + 12313183.

It is an arithmetic number, because the mean of its divisors is an integer number (86192197).

Almost surely, 2^320142433 is an apocalyptic number.

It is an amenable number.

320142433 is a deficient number, since it is larger than the sum of its proper divisors (24626355).

320142433 is a wasteful number, since it uses less digits than its factorization.

320142433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24626354.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 320142433 is about 17892.5245004723. The cubic root of 320142433 is about 684.0918457027.

Adding to 320142433 its reverse (334241023), we get a palindrome (654383456).

The spelling of 320142433 in words is "three hundred twenty million, one hundred forty-two thousand, four hundred thirty-three".