15315000 has 80 divisors (see below), whose sum is σ = 47890920. Its totient is φ = 4080000.

The previous prime is 15314989. The next prime is 15315029. The reversal of 15315000 is 51351.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 14490 + ... + 15510.

Almost surely, 2^15315000 is an apocalyptic number.

15315000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15315000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23945460).

15315000 is an abundant number, since it is smaller than the sum of its proper divisors (32575920).

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

15315000 is a wasteful number, since it uses less digits than its factorization.

15315000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 75, while the sum is 15.

The square root of 15315000 is about 3913.4383858699. The cubic root of 15315000 is about 248.3356104872.

Adding to 15315000 its reverse (51351), we get a palindrome (15366351).

The spelling of 15315000 in words is "fifteen million, three hundred fifteen thousand".