15132240 has 60 divisors (see below), whose sum is σ = 50821524. Its totient is φ = 4035072.

The previous prime is 15132217. The next prime is 15132251. The reversal of 15132240 is 4223151.

15132240 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 2 ways, for example, as 1648656 + 13483584 = 1284^2 + 3672^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9789 + ... + 11228.

Almost surely, 2^15132240 is an apocalyptic number.

15132240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15132240 is an abundant number, since it is smaller than the sum of its proper divisors (35689284).

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

15132240 is a wasteful number, since it uses less digits than its factorization.

15132240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21036 (or 21027 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 15132240 is about 3890.0179948170. The cubic root of 15132240 is about 247.3438255628.

Adding to 15132240 its reverse (4223151), we get a palindrome (19355391).

The spelling of 15132240 in words is "fifteen million, one hundred thirty-two thousand, two hundred forty".