203564512145 has 8 divisors (see below), whose sum is σ = 244280057640. Its totient is φ = 162849847680.

The previous prime is 203564512121. The next prime is 203564512147. The reversal of 203564512145 is 541215465302.

It can be written as a sum of positive squares in 4 ways, for example, as 1144604224 + 202419907921 = 33832^2 + 449911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 203564512145 - 2¹⁰ = 203564511121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203564512099 and 203564512108.

It is not an unprimeable number, because it can be changed into a prime (203564512147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505421 + ... + 813989.

It is an arithmetic number, because the mean of its divisors is an integer number (30535007205).

Almost surely, 2^203564512145 is an apocalyptic number.

It is an amenable number.

203564512145 is a deficient number, since it is larger than the sum of its proper divisors (40715545495).

203564512145 is a wasteful number, since it uses less digits than its factorization.

203564512145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440515.

The product of its (nonzero) digits is 144000, while the sum is 38.

Adding to 203564512145 its reverse (541215465302), we get a palindrome (744779977447).

The spelling of 203564512145 in words is "two hundred three billion, five hundred sixty-four million, five hundred twelve thousand, one hundred forty-five".