122531218 has 4 divisors (see below), whose sum is σ = 183796830. Its totient is φ = 61265608.

The previous prime is 122531203. The next prime is 122531219. The reversal of 122531218 is 812135221.

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

It can be written as a sum of positive squares in only one way, i.e., 114425809 + 8105409 = 10697^2 + 2847^2 .

It is a junction number, because it is equal to n+sod(n) for n = 122531192 and 122531201.

It is not an unprimeable number, because it can be changed into a prime (122531219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30632803 + ... + 30632806.

Almost surely, 2^122531218 is an apocalyptic number.

122531218 is a deficient number, since it is larger than the sum of its proper divisors (61265612).

122531218 is an equidigital number, since it uses as much as digits as its factorization.

122531218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61265611.

The product of its digits is 960, while the sum is 25.

The square root of 122531218 is about 11069.3820062368. The cubic root of 122531218 is about 496.6863790103.

Adding to 122531218 its reverse (812135221), we get a palindrome (934666439).

The spelling of 122531218 in words is "one hundred twenty-two million, five hundred thirty-one thousand, two hundred eighteen".