203323410321155 has 4 divisors (see below), whose sum is σ = 243988092385392. Its totient is φ = 162658728256920.

The previous prime is 203323410321137. The next prime is 203323410321167. The reversal of 203323410321155 is 551123014323302.

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

It is not a de Polignac number, because 203323410321155 - 2¹⁶ = 203323410255619 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20332341032111 + ... + 20332341032120.

It is an arithmetic number, because the mean of its divisors is an integer number (60997023096348).

Almost surely, 2^{203323410321155} is an apocalyptic number.

203323410321155 is a deficient number, since it is larger than the sum of its proper divisors (40664682064237).

203323410321155 is an equidigital number, since it uses as much as digits as its factorization.

203323410321155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40664682064236.

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

Adding to 203323410321155 its reverse (551123014323302), we get a palindrome (754446424644457).

The spelling of 203323410321155 in words is "two hundred three trillion, three hundred twenty-three billion, four hundred ten million, three hundred twenty-one thousand, one hundred fifty-five".