16320105234225 has 81 divisors (see below), whose sum is σ = 31654162801443. Its totient is φ = 8034125523840.

The previous prime is 16320105234187. The next prime is 16320105234259. The reversal of 16320105234225 is 52243250102361.

The square root of 16320105234225 is 4039815.

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

16320105234225 is a `hidden beast` number, since 1 + 6 + 3 + 201 + 0 + 5 + 23 + 422 + 5 = 666.

It can be written as a sum of positive squares in 13 ways, for example, as 14018367180321 + 2301738053904 = 3744111^2 + 1517148^2 .

It is not a de Polignac number, because 16320105234225 - 2⁹ = 16320105233713 is a prime.

It is a super-2 number, since 2×16320105234225² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16320105234225.

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, 787753567 + ... + 787774283.

Almost surely, 2^{16320105234225} is an apocalyptic number.

16320105234225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16320105234225 is the 4039815-th square number.

16320105234225 is the 2019908-th centered octagonal number.

It is an amenable number.

16320105234225 is a deficient number, since it is larger than the sum of its proper divisors (15334057567218).

16320105234225 is an frugal number, since it uses more digits than its factorization.

16320105234225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41476 (or 20738 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Multiplying 16320105234225 by its sum of digits (36), we get a square (587523788432100 = 24238890²).

Adding to 16320105234225 its reverse (52243250102361), we get a palindrome (68563355336586).

The spelling of 16320105234225 in words is "sixteen trillion, three hundred twenty billion, one hundred five million, two hundred thirty-four thousand, two hundred twenty-five".