216410925 has 24 divisors (see below), whose sum is σ = 364557024. Its totient is φ = 113239360.

The previous prime is 216410917. The next prime is 216410927. The reversal of 216410925 is 529014612.

It is not a de Polignac number, because 216410925 - 2³ = 216410917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216410892 and 216410901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216410927) 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, 23247 + ... + 31196.

It is an arithmetic number, because the mean of its divisors is an integer number (15189876).

Almost surely, 2^216410925 is an apocalyptic number.

216410925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216410925 is a deficient number, since it is larger than the sum of its proper divisors (148146099).

216410925 is a wasteful number, since it uses less digits than its factorization.

216410925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54509 (or 54504 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 216410925 is about 14710.9117664406. The cubic root of 216410925 is about 600.3802450830.

The spelling of 216410925 in words is "two hundred sixteen million, four hundred ten thousand, nine hundred twenty-five".