15113540 has 24 divisors (see below), whose sum is σ = 34180440. Its totient is φ = 5580288.

The previous prime is 15113537. The next prime is 15113551. The reversal of 15113540 is 4531151.

15113540 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 2553604 + 12559936 = 1598^2 + 3544^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28805 + ... + 29324.

It is an arithmetic number, because the mean of its divisors is an integer number (1424185).

Almost surely, 2^15113540 is an apocalyptic number.

15113540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15113540 is an abundant number, since it is smaller than the sum of its proper divisors (19066900).

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

15113540 is a wasteful number, since it uses less digits than its factorization.

15113540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58151 (or 58149 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 15113540 is about 3887.6136639332. The cubic root of 15113540 is about 247.2418966981.

Adding to 15113540 its reverse (4531151), we get a palindrome (19644691).

The spelling of 15113540 in words is "fifteen million, one hundred thirteen thousand, five hundred forty".