39156225 has 12 divisors (see below), whose sum is σ = 64738416. Its totient is φ = 20883280.

The previous prime is 39156223. The next prime is 39156269. The reversal of 39156225 is 52265193.

It is not a de Polignac number, because 39156225 - 2¹ = 39156223 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (39156223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 260967 + ... + 261116.

It is an arithmetic number, because the mean of its divisors is an integer number (5394868).

Almost surely, 2^39156225 is an apocalyptic number.

It is an amenable number.

39156225 is a deficient number, since it is larger than the sum of its proper divisors (25582191).

39156225 is a wasteful number, since it uses less digits than its factorization.

39156225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522096 (or 522091 counting only the distinct ones).

The product of its digits is 16200, while the sum is 33.

The square root of 39156225 is about 6257.4935077873. The cubic root of 39156225 is about 339.5733547028.

It can be divided in two parts, 391 and 56225, that added together give a triangular number (56616 = T₃₃₆).

The spelling of 39156225 in words is "thirty-nine million, one hundred fifty-six thousand, two hundred twenty-five".