318105551903 has 4 divisors (see below), whose sum is σ = 318130717200. Its totient is φ = 318080386608.

The previous prime is 318105551899. The next prime is 318105551917. The reversal of 318105551903 is 309155501813.

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

It is a cyclic number.

It is not a de Polignac number, because 318105551903 - 2² = 318105551899 is a prime.

It is a super-2 number, since 2×318105551903² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318105551923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12563678 + ... + 12588971.

It is an arithmetic number, because the mean of its divisors is an integer number (79532679300).

Almost surely, 2^318105551903 is an apocalyptic number.

318105551903 is a deficient number, since it is larger than the sum of its proper divisors (25165297).

318105551903 is a wasteful number, since it uses less digits than its factorization.

318105551903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25165296.

The product of its (nonzero) digits is 81000, while the sum is 41.

The spelling of 318105551903 in words is "three hundred eighteen billion, one hundred five million, five hundred fifty-one thousand, nine hundred three".