618226231 has 4 divisors (see below), whose sum is σ = 706544272. Its totient is φ = 529908192.

The previous prime is 618226207. The next prime is 618226261. The reversal of 618226231 is 132622816.

618226231 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-618226231 is a prime.

It is a super-2 number, since 2×618226231² = 764407345392930722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 618226193 and 618226202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618226201) 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, 44159010 + ... + 44159023.

It is an arithmetic number, because the mean of its divisors is an integer number (176636068).

Almost surely, 2^618226231 is an apocalyptic number.

618226231 is a deficient number, since it is larger than the sum of its proper divisors (88318041).

618226231 is an equidigital number, since it uses as much as digits as its factorization.

618226231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88318040.

The product of its digits is 6912, while the sum is 31.

The square root of 618226231 is about 24864.1555456846. The cubic root of 618226231 is about 851.8879516259.

The spelling of 618226231 in words is "six hundred eighteen million, two hundred twenty-six thousand, two hundred thirty-one".