15315145 has 8 divisors (see below), whose sum is σ = 18725256. Its totient is φ = 12020736.

The previous prime is 15315119. The next prime is 15315149. The reversal of 15315145 is 54151351.

It is a happy number.

15315145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4372281 + 10942864 = 2091^2 + 3308^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15315145 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15315149) 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, 28632 + ... + 29161.

It is an arithmetic number, because the mean of its divisors is an integer number (2340657).

Almost surely, 2^15315145 is an apocalyptic number.

It is an amenable number.

15315145 is a deficient number, since it is larger than the sum of its proper divisors (3410111).

15315145 is an equidigital number, since it uses as much as digits as its factorization.

15315145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57851.

The product of its digits is 1500, while the sum is 25.

The square root of 15315145 is about 3913.4569117342. The cubic root of 15315145 is about 248.3363942188.

Adding to 15315145 its reverse (54151351), we get a palindrome (69466496).

The spelling of 15315145 in words is "fifteen million, three hundred fifteen thousand, one hundred forty-five".