216242025 has 24 divisors (see below), whose sum is σ = 359396640. Its totient is φ = 114723840.

The previous prime is 216241999. The next prime is 216242027. The reversal of 216242025 is 520242612.

It is a happy number.

It is not a de Polignac number, because 216242025 - 2⁸ = 216241769 is a prime.

It is a super-2 number, since 2×216242025² = 93521226752201250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216241986 and 216242004.

It is not an unprimeable number, because it can be changed into a prime (216242027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7006 + ... + 21944.

It is an arithmetic number, because the mean of its divisors is an integer number (14974860).

Almost surely, 2^216242025 is an apocalyptic number.

216242025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216242025 is a deficient number, since it is larger than the sum of its proper divisors (143154615).

216242025 is a wasteful number, since it uses less digits than its factorization.

216242025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15145 (or 15140 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 216242025 is about 14705.1700092178. The cubic root of 216242025 is about 600.2240135750.

Adding to 216242025 its reverse (520242612), we get a palindrome (736484637).

The spelling of 216242025 in words is "two hundred sixteen million, two hundred forty-two thousand, twenty-five".