15315138 has 48 divisors (see below), whose sum is σ = 34759296. Its totient is φ = 4868640.

The previous prime is 15315119. The next prime is 15315149. The reversal of 15315138 is 83151351.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36168 + ... + 36588.

It is an arithmetic number, because the mean of its divisors is an integer number (724152).

Almost surely, 2^15315138 is an apocalyptic number.

15315138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

15315138 is an abundant number, since it is smaller than the sum of its proper divisors (19444158).

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

15315138 is a wasteful number, since it uses less digits than its factorization.

15315138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 516 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 15315138 is about 3913.4560173841. The cubic root of 15315138 is about 248.3363563836.

Adding to 15315138 its reverse (83151351), we get a palindrome (98466489).

The spelling of 15315138 in words is "fifteen million, three hundred fifteen thousand, one hundred thirty-eight".