216342525 has 24 divisors (see below), whose sum is σ = 408785344. Its totient is φ = 98899200.

The previous prime is 216342509. The next prime is 216342541. The reversal of 216342525 is 525243612.

It is an interprime number because it is at equal distance from previous prime (216342509) and next prime (216342541).

It is not a de Polignac number, because 216342525 - 2⁴ = 216342509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 216342492 and 216342501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205516 + ... + 206565.

Almost surely, 2^216342525 is an apocalyptic number.

216342525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216342525 is a deficient number, since it is larger than the sum of its proper divisors (192442819).

216342525 is a wasteful number, since it uses less digits than its factorization.

216342525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412101 (or 412096 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 216342525 is about 14708.5867777975. The cubic root of 216342525 is about 600.3169852822.

The spelling of 216342525 in words is "two hundred sixteen million, three hundred forty-two thousand, five hundred twenty-five".