203145425 has 18 divisors (see below), whose sum is σ = 293028678. Its totient is φ = 139298880.

The previous prime is 203145409. The next prime is 203145443. The reversal of 203145425 is 524541302.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 25921 + 203119504 = 161^2 + 14252^2 .

It is not a de Polignac number, because 203145425 - 2⁴ = 203145409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203145394 and 203145403.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 81692 + ... + 84141.

It is an arithmetic number, because the mean of its divisors is an integer number (16279371).

Almost surely, 2^203145425 is an apocalyptic number.

203145425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

203145425 is a deficient number, since it is larger than the sum of its proper divisors (89883253).

203145425 is a wasteful number, since it uses less digits than its factorization.

203145425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165857 (or 165845 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 203145425 is about 14252.9093521288. The cubic root of 203145425 is about 587.8533742487.

Adding to 203145425 its reverse (524541302), we get a palindrome (727686727).

The spelling of 203145425 in words is "two hundred three million, one hundred forty-five thousand, four hundred twenty-five".