305123213252 has 48 divisors (see below), whose sum is σ = 629114136000. Its totient is φ = 127656812160.

The previous prime is 305123213237. The next prime is 305123213261. The reversal of 305123213252 is 252312321503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564602 + ... + 963857.

It is an arithmetic number, because the mean of its divisors is an integer number (13106544500).

Almost surely, 2^305123213252 is an apocalyptic number.

It is an amenable number.

305123213252 is an abundant number, since it is smaller than the sum of its proper divisors (323990922748).

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

305123213252 is a wasteful number, since it uses less digits than its factorization.

305123213252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528836 (or 1528834 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 305123213252 its reverse (252312321503), we get a palindrome (557435534755).

The spelling of 305123213252 in words is "three hundred five billion, one hundred twenty-three million, two hundred thirteen thousand, two hundred fifty-two".