203115015645313 has 4 divisors (see below), whose sum is σ = 203117723306820. Its totient is φ = 203112307983808.

The previous prime is 203115015645281. The next prime is 203115015645323. The reversal of 203115015645313 is 313546510511302.

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 90511762530289 + 112603253115024 = 9513767^2 + 10611468^2 .

It is a cyclic number.

It is not a de Polignac number, because 203115015645313 - 2⁵ = 203115015645281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203115015645323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1353718228 + ... + 1353868261.

It is an arithmetic number, because the mean of its divisors is an integer number (50779430826705).

Almost surely, 2^{203115015645313} is an apocalyptic number.

It is an amenable number.

203115015645313 is a deficient number, since it is larger than the sum of its proper divisors (2707661507).

203115015645313 is an equidigital number, since it uses as much as digits as its factorization.

203115015645313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707661506.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 203115015645313 in words is "two hundred three trillion, one hundred fifteen billion, fifteen million, six hundred forty-five thousand, three hundred thirteen".