305251500040 has 32 divisors (see below), whose sum is σ = 688795202880. Its totient is φ = 121748719552.

The previous prime is 305251499977. The next prime is 305251500041. The reversal of 305251500040 is 40005152503.

It is a junction number, because it is equal to n+sod(n) for n = 305251499978 and 305251500014.

It is not an unprimeable number, because it can be changed into a prime (305251500041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10982212 + ... + 11009971.

It is an arithmetic number, because the mean of its divisors is an integer number (21524850090).

Almost surely, 2^305251500040 is an apocalyptic number.

It is an amenable number.

305251500040 is an abundant number, since it is smaller than the sum of its proper divisors (383543702840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

305251500040 is a wasteful number, since it uses less digits than its factorization.

305251500040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21992541 (or 21992537 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 305251500040 its reverse (40005152503), we get a palindrome (345256652543).

The spelling of 305251500040 in words is "three hundred five billion, two hundred fifty-one million, five hundred thousand, forty".