618322143 has 4 divisors (see below), whose sum is σ = 824429528. Its totient is φ = 412214760.

The previous prime is 618322129. The next prime is 618322151. The reversal of 618322143 is 341223816.

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

It is not a de Polignac number, because 618322143 - 2⁹ = 618321631 is a prime.

It is a super-2 number, since 2×618322143² = 764644545048224898, 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 618322143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618329143) 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, 103053688 + ... + 103053693.

It is an arithmetic number, because the mean of its divisors is an integer number (206107382).

Almost surely, 2^618322143 is an apocalyptic number.

618322143 is a deficient number, since it is larger than the sum of its proper divisors (206107385).

618322143 is a wasteful number, since it uses less digits than its factorization.

618322143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206107384.

The product of its digits is 6912, while the sum is 30.

The square root of 618322143 is about 24866.0841911227. The cubic root of 618322143 is about 851.9320034893.

Adding to 618322143 its reverse (341223816), we get a palindrome (959545959).

The spelling of 618322143 in words is "six hundred eighteen million, three hundred twenty-two thousand, one hundred forty-three".