203144425 has 12 divisors (see below), whose sum is σ = 274799376. Its totient is φ = 147741200.

The previous prime is 203144401. The next prime is 203144429. The reversal of 203144425 is 524441302.

It is a happy number.

It is not a de Polignac number, because 203144425 - 2²³ = 194755817 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203144425.

It is not an unprimeable number, because it can be changed into a prime (203144429) 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, 369079 + ... + 369628.

It is an arithmetic number, because the mean of its divisors is an integer number (22899948).

Almost surely, 2^203144425 is an apocalyptic number.

203144425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

203144425 is a deficient number, since it is larger than the sum of its proper divisors (71654951).

203144425 is a wasteful number, since it uses less digits than its factorization.

203144425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738728 (or 738723 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 203144425 is about 14252.8742715285. The cubic root of 203144425 is about 587.8524096616.

Adding to 203144425 its reverse (524441302), we get a palindrome (727585727).

The spelling of 203144425 in words is "two hundred three million, one hundred forty-four thousand, four hundred twenty-five".