216303351525 has 18 divisors (see below), whose sum is σ = 387423336690. Its totient is φ = 115361787360.

The previous prime is 216303351497. The next prime is 216303351533. The reversal of 216303351525 is 525153303612.

216303351525 is a `hidden beast` number, since 2 + 1 + 630 + 3 + 3 + 5 + 15 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 37300741956 + 179002609569 = 193134^2 + 423087^2 .

It is not a de Polignac number, because 216303351525 - 2⁹ = 216303351013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216303351525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 480673890 + ... + 480674339.

It is an arithmetic number, because the mean of its divisors is an integer number (21523518705).

Almost surely, 2^216303351525 is an apocalyptic number.

216303351525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216303351525 is a deficient number, since it is larger than the sum of its proper divisors (171119985165).

216303351525 is a wasteful number, since it uses less digits than its factorization.

216303351525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961348245 (or 961348237 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The spelling of 216303351525 in words is "two hundred sixteen billion, three hundred three million, three hundred fifty-one thousand, five hundred twenty-five".