203155225 has 36 divisors (see below), whose sum is σ = 315607404. Its totient is φ = 128580480.

The previous prime is 203155223. The next prime is 203155241. The reversal of 203155225 is 522551302.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 17405584 + 185749641 = 4172^2 + 13629^2 .

It is not a de Polignac number, because 203155225 - 2¹ = 203155223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 203155225.

It is not an unprimeable number, because it can be changed into a prime (203155223) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9547 + ... + 22303.

Almost surely, 2^203155225 is an apocalyptic number.

203155225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

203155225 is a deficient number, since it is larger than the sum of its proper divisors (112452179).

203155225 is a wasteful number, since it uses less digits than its factorization.

203155225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12794 (or 12782 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 203155225 is about 14253.2531374420. The cubic root of 203155225 is about 587.8628270343.

The spelling of 203155225 in words is "two hundred three million, one hundred fifty-five thousand, two hundred twenty-five".