12315500 has 24 divisors (see below), whose sum is σ = 26898144. Its totient is φ = 4926000.

The previous prime is 12315493. The next prime is 12315509. The reversal of 12315500 is 551321.

It is not an unprimeable number, because it can be changed into a prime (12315509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11816 + ... + 12815.

It is an arithmetic number, because the mean of its divisors is an integer number (1120756).

Almost surely, 2^12315500 is an apocalyptic number.

12315500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12315500 is an abundant number, since it is smaller than the sum of its proper divisors (14582644).

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

12315500 is a wasteful number, since it uses less digits than its factorization.

12315500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24650 (or 24638 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 12315500 is about 3509.3446681681. The cubic root of 12315500 is about 230.9319464955.

Adding to 12315500 its reverse (551321), we get a palindrome (12866821).

The spelling of 12315500 in words is "twelve million, three hundred fifteen thousand, five hundred".