15320825 has 48 divisors (see below), whose sum is σ = 22498560. Its totient is φ = 10245120.

The previous prime is 15320819. The next prime is 15320827. The reversal of 15320825 is 52802351.

It is not a de Polignac number, because 15320825 - 2¹⁴ = 15304441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15320794 and 15320803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15320827) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 259646 + ... + 259704.

It is an arithmetic number, because the mean of its divisors is an integer number (468720).

Almost surely, 2^15320825 is an apocalyptic number.

It is an amenable number.

15320825 is a deficient number, since it is larger than the sum of its proper divisors (7177735).

15320825 is a wasteful number, since it uses less digits than its factorization.

15320825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 15320825 is about 3914.1825455643. The cubic root of 15320825 is about 248.3670909872.

It can be divided in two parts, 153 and 20825, that multiplied together give a square (3186225 = 1785²).

The spelling of 15320825 in words is "fifteen million, three hundred twenty thousand, eight hundred twenty-five".