203145395825 has 12 divisors (see below), whose sum is σ = 251992009500. Its totient is φ = 162457143360.

The previous prime is 203145395819. The next prime is 203145395881. The reversal of 203145395825 is 528593541302.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 32946243121 + 170199152704 = 181511^2 + 412552^2 .

It is not a de Polignac number, because 203145395825 - 2²² = 203141201521 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 203145395825.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1409234 + ... + 1546683.

It is an arithmetic number, because the mean of its divisors is an integer number (20999334125).

Almost surely, 2^203145395825 is an apocalyptic number.

203145395825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

203145395825 is a deficient number, since it is larger than the sum of its proper divisors (48846613675).

203145395825 is a wasteful number, since it uses less digits than its factorization.

203145395825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2958676 (or 2958671 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 203145395825 in words is "two hundred three billion, one hundred forty-five million, three hundred ninety-five thousand, eight hundred twenty-five".