30281523208225 has 81 divisors (see below), whose sum is σ = 39706506044793. Its totient is φ = 22907062284480.

The previous prime is 30281523208193. The next prime is 30281523208243. The reversal of 30281523208225 is 52280232518203.

The square root of 30281523208225 is 5502865.

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

It can be written as a sum of positive squares in 4 ways, for example, as 111022906401 + 30170500301824 = 333201^2 + 5492768^2 .

It is not a de Polignac number, because 30281523208225 - 2⁵ = 30281523208193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 68978412556 + ... + 68978412994.

Almost surely, 2^{30281523208225} is an apocalyptic number.

30281523208225 is the 5502865-th square number.

30281523208225 is the 2751433-rd centered octagonal number.

It is an amenable number.

30281523208225 is a deficient number, since it is larger than the sum of its proper divisors (9424982836568).

30281523208225 is an frugal number, since it uses more digits than its factorization.

30281523208225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152 (or 576 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 43.

The spelling of 30281523208225 in words is "thirty trillion, two hundred eighty-one billion, five hundred twenty-three million, two hundred eight thousand, two hundred twenty-five".