30281916289 has 3 divisors (see below), whose sum is σ = 30282090307. Its totient is φ = 30281742272.

The previous prime is 30281916257. The next prime is 30281916331. The reversal of 30281916289 is 98261918203.

The square root of 30281916289 is 174017.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 29616689025 + 665227264 = 172095^2 + 25792^2 .

It is not a de Polignac number, because 30281916289 - 2⁵ = 30281916257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30281916209) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 87009 + ... + 261025.

Almost surely, 2^30281916289 is an apocalyptic number.

30281916289 is the 174017-th square number.

30281916289 is the 87009-th centered octagonal number.

It is an amenable number.

30281916289 is a deficient number, since it is larger than the sum of its proper divisors (174018).

30281916289 is an frugal number, since it uses more digits than its factorization.

30281916289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348034 (or 174017 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 49.

Multiplying 30281916289 by its sum of digits (49), we get a square (1483813898161 = 1218119²).

The spelling of 30281916289 in words is "thirty billion, two hundred eighty-one million, nine hundred sixteen thousand, two hundred eighty-nine".