15225040 has 20 divisors (see below), whose sum is σ = 35398404. Its totient is φ = 6089984.

The previous prime is 15225031. The next prime is 15225079. The reversal of 15225040 is 4052251.

It can be written as a sum of positive squares in 2 ways, for example, as 2322576 + 12902464 = 1524^2 + 3592^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 15224999 and 15225017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95077 + ... + 95236.

Almost surely, 2^15225040 is an apocalyptic number.

15225040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15225040 is an abundant number, since it is smaller than the sum of its proper divisors (20173364).

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

15225040 is a wasteful number, since it uses less digits than its factorization.

15225040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190326 (or 190320 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 15225040 is about 3901.9277287003. The cubic root of 15225040 is about 247.8484158648.

Adding to 15225040 its reverse (4052251), we get a palindrome (19277291).

The spelling of 15225040 in words is "fifteen million, two hundred twenty-five thousand, forty".