203100043453 has 6 divisors (see below), whose sum is σ = 204593365466. Its totient is φ = 201617542752.

The previous prime is 203100043451. The next prime is 203100043541. The reversal of 203100043453 is 354340001302.

It can be written as a sum of positive squares in 3 ways, for example, as 4132304089 + 198967739364 = 64283^2 + 446058^2 .

It is not a de Polignac number, because 203100043453 - 2¹ = 203100043451 is a prime.

It is a super-2 number, since 2×203100043453² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203100043451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5391750 + ... + 5429287.

Almost surely, 2^203100043453 is an apocalyptic number.

It is an amenable number.

203100043453 is a deficient number, since it is larger than the sum of its proper divisors (1493322013).

203100043453 is an equidigital number, since it uses as much as digits as its factorization.

203100043453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10821311 (or 10821174 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 203100043453 its reverse (354340001302), we get a palindrome (557440044755).

The spelling of 203100043453 in words is "two hundred three billion, one hundred million, forty-three thousand, four hundred fifty-three".