203644241031145 has 4 divisors (see below), whose sum is σ = 244373089237380. Its totient is φ = 162915392824912.

The previous prime is 203644241031071. The next prime is 203644241031169. The reversal of 203644241031145 is 541130142446302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 144401463424656 + 59242777606489 = 12016716^2 + 7696933^2 .

It is a cyclic number.

It is not a de Polignac number, because 203644241031145 - 2¹⁹ = 203644240506857 is a prime.

It is a super-2 number, since 2×203644241031145² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203644241031098 and 203644241031107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20364424103110 + ... + 20364424103119.

It is an arithmetic number, because the mean of its divisors is an integer number (61093272309345).

Almost surely, 2^{203644241031145} is an apocalyptic number.

It is an amenable number.

203644241031145 is a deficient number, since it is larger than the sum of its proper divisors (40728848206235).

203644241031145 is an equidigital number, since it uses as much as digits as its factorization.

203644241031145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40728848206234.

The product of its (nonzero) digits is 276480, while the sum is 40.

Adding to 203644241031145 its reverse (541130142446302), we get a palindrome (744774383477447).

The spelling of 203644241031145 in words is "two hundred three trillion, six hundred forty-four billion, two hundred forty-one million, thirty-one thousand, one hundred forty-five".