15552240 has 160 divisors (see below), whose sum is σ = 54210816. Its totient is φ = 3655680.

The previous prime is 15552233. The next prime is 15552259. The reversal of 15552240 is 4225551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 15552240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113452 + ... + 113588.

Almost surely, 2^15552240 is an apocalyptic number.

15552240 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 15552240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27105408).

15552240 is an abundant number, since it is smaller than the sum of its proper divisors (38658576).

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

15552240 is a wasteful number, since it uses less digits than its factorization.

15552240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 15552240 is about 3943.6328429508. The cubic root of 15552240 is about 249.6113427620.

Adding to 15552240 its reverse (4225551), we get a palindrome (19777791).

It can be divided in two parts, 15 and 552240, that added together give a palindrome (552255).

The spelling of 15552240 in words is "fifteen million, five hundred fifty-two thousand, two hundred forty".