203455342225 has 12 divisors (see below), whose sum is σ = 252290551900. Its totient is φ = 162760449600.

The previous prime is 203455342213. The next prime is 203455342249. The reversal of 203455342225 is 522243554302.

It can be written as a sum of positive squares in 6 ways, for example, as 5714150464 + 197741191761 = 75592^2 + 444681^2 .

It is a de Polignac number, because none of the positive numbers 2^k-203455342225 is a prime.

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, 1535095 + ... + 1662355.

Almost surely, 2^203455342225 is an apocalyptic number.

203455342225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

203455342225 is a deficient number, since it is larger than the sum of its proper divisors (48835209675).

203455342225 is a wasteful number, since it uses less digits than its factorization.

203455342225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191220 (or 191215 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 37.

Adding to 203455342225 its reverse (522243554302), we get a palindrome (725698896527).

The spelling of 203455342225 in words is "two hundred three billion, four hundred fifty-five million, three hundred forty-two thousand, two hundred twenty-five".