305434180921 has 9 divisors (see below), whose sum is σ = 306397175461. Its totient is φ = 304474208764.

The previous prime is 305434180873. The next prime is 305434180949. The reversal of 305434180921 is 129081434503.

It is a happy number.

The square root of 305434180921 is 552661.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-305434180921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (305434184921) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 231564300 + ... + 231565618.

Almost surely, 2^305434180921 is an apocalyptic number.

305434180921 is the 552661-st square number.

305434180921 is the 276331-st centered octagonal number.

It is an amenable number.

305434180921 is a deficient number, since it is larger than the sum of its proper divisors (962994540).

305434180921 is an frugal number, since it uses more digits than its factorization.

305434180921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476 (or 1738 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 305434180921 in words is "three hundred five billion, four hundred thirty-four million, one hundred eighty thousand, nine hundred twenty-one".