15315648 has 28 divisors (see below), whose sum is σ = 40523160. Its totient is φ = 5105152.

The previous prime is 15315647. The next prime is 15315649. The reversal of 15315648 is 84651351.

It is an interprime number because it is at equal distance from previous prime (15315647) and next prime (15315649).

It is a super-3 number, since 3×15315648³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (15315647) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 39693 + ... + 40076.

Almost surely, 2^15315648 is an apocalyptic number.

It is an amenable number.

15315648 is an abundant number, since it is smaller than the sum of its proper divisors (25207512).

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

15315648 is an equidigital number, since it uses as much as digits as its factorization.

15315648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79784 (or 79774 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 15315648 is about 3913.5211766388. The cubic root of 15315648 is about 248.3391129185.

Adding to 15315648 its reverse (84651351), we get a palindrome (99966999).

The spelling of 15315648 in words is "fifteen million, three hundred fifteen thousand, six hundred forty-eight".