15850225 has 12 divisors (see below), whose sum is σ = 19716124. Its totient is φ = 12640320.

The previous prime is 15850223. The next prime is 15850267. The reversal of 15850225 is 52205851.

It can be written as a sum of positive squares in 6 ways, for example, as 725904 + 15124321 = 852^2 + 3889^2 .

It is not a de Polignac number, because 15850225 - 2¹ = 15850223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15850193 and 15850202.

It is not an unprimeable number, because it can be changed into a prime (15850223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9127 + ... + 10723.

Almost surely, 2^15850225 is an apocalyptic number.

It is an amenable number.

15850225 is a deficient number, since it is larger than the sum of its proper divisors (3865899).

15850225 is a wasteful number, since it uses less digits than its factorization.

15850225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004 (or 1999 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 15850225 is about 3981.2341051488. The cubic root of 15850225 is about 251.1954742531.

The spelling of 15850225 in words is "fifteen million, eight hundred fifty thousand, two hundred twenty-five".