216425000 has 96 divisors (see below), whose sum is σ = 554027040. Its totient is φ = 78600000.

The previous prime is 216424997. The next prime is 216425017. The reversal of 216425000 is 524612.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 274607 + ... + 275393.

It is an arithmetic number, because the mean of its divisors is an integer number (5771115).

Almost surely, 2^216425000 is an apocalyptic number.

216425000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216425000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277013520).

216425000 is an abundant number, since it is smaller than the sum of its proper divisors (337602040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216425000 is an equidigital number, since it uses as much as digits as its factorization.

216425000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 216425000 is about 14711.3901450543. The cubic root of 216425000 is about 600.3932607056.

Adding to 216425000 its reverse (524612), we get a palindrome (216949612).

The spelling of 216425000 in words is "two hundred sixteen million, four hundred twenty-five thousand".