123315510 has 64 divisors (see below), whose sum is σ = 316281600. Its totient is φ = 30678912.

The previous prime is 123315503. The next prime is 123315527. The reversal of 123315510 is 15513321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36576 + ... + 39804.

It is an arithmetic number, because the mean of its divisors is an integer number (4941900).

Almost surely, 2^123315510 is an apocalyptic number.

123315510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123315510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158140800).

123315510 is an abundant number, since it is smaller than the sum of its proper divisors (192966090).

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

123315510 is a wasteful number, since it uses less digits than its factorization.

123315510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 123315510 is about 11104.7516856524. The cubic root of 123315510 is about 497.7438482039.

Adding to 123315510 its reverse (15513321), we get a palindrome (138828831).

The spelling of 123315510 in words is "one hundred twenty-three million, three hundred fifteen thousand, five hundred ten".