203400554540323 has 8 divisors (see below), whose sum is σ = 233430403299840. Its totient is φ = 173613862451400.

The previous prime is 203400554540317. The next prime is 203400554540329. The reversal of 203400554540323 is 323045455004302.

It is an interprime number because it is at equal distance from previous prime (203400554540317) and next prime (203400554540329).

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

It is a de Polignac number, because none of the positive numbers 2^k-203400554540323 is a prime.

It is a super-2 number, since 2×203400554540323² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203400554540329) 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, 60789165853 + ... + 60789169198.

It is an arithmetic number, because the mean of its divisors is an integer number (29178800412480).

Almost surely, 2^{203400554540323} is an apocalyptic number.

203400554540323 is a deficient number, since it is larger than the sum of its proper divisors (30029848759517).

203400554540323 is a wasteful number, since it uses less digits than its factorization.

203400554540323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121578335297.

The product of its (nonzero) digits is 864000, while the sum is 40.

The spelling of 203400554540323 in words is "two hundred three trillion, four hundred billion, five hundred fifty-four million, five hundred forty thousand, three hundred twenty-three".