203252630561 has 4 divisors (see below), whose sum is σ = 204598674624. Its totient is φ = 201906586500.

The previous prime is 203252630531. The next prime is 203252630593. The reversal of 203252630561 is 165036252302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 203252630561 - 2³⁴ = 186072761377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203252630531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 673021805 + ... + 673022106.

It is an arithmetic number, because the mean of its divisors is an integer number (51149668656).

Almost surely, 2^203252630561 is an apocalyptic number.

It is an amenable number.

203252630561 is a deficient number, since it is larger than the sum of its proper divisors (1346044063).

203252630561 is a wasteful number, since it uses less digits than its factorization.

203252630561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346044062.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 203252630561 its reverse (165036252302), we get a palindrome (368288882863).

The spelling of 203252630561 in words is "two hundred three billion, two hundred fifty-two million, six hundred thirty thousand, five hundred sixty-one".