123315522 has 32 divisors (see below), whose sum is σ = 269524800. Its totient is φ = 37302720.

The previous prime is 123315503. The next prime is 123315527. The reversal of 123315522 is 225513321.

It is a happy number.

It is a super-2 number, since 2×123315522² = 30413435932264968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123315492 and 123315501.

It is not an unprimeable number, because it can be changed into a prime (123315527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47104 + ... + 49652.

It is an arithmetic number, because the mean of its divisors is an integer number (8422650).

Almost surely, 2^123315522 is an apocalyptic number.

123315522 is an abundant number, since it is smaller than the sum of its proper divisors (146209278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123315522 is a wasteful number, since it uses less digits than its factorization.

123315522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3298.

The product of its digits is 1800, while the sum is 24.

The square root of 123315522 is about 11104.7522259616. The cubic root of 123315522 is about 497.7438643493.

Adding to 123315522 its reverse (225513321), we get a palindrome (348828843).

The spelling of 123315522 in words is "one hundred twenty-three million, three hundred fifteen thousand, five hundred twenty-two".