220497816 has 96 divisors (see below), whose sum is σ = 692536320. Its totient is φ = 57266880.

The previous prime is 220497791. The next prime is 220497829. The reversal of 220497816 is 618794022.

It is a congruent number.

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, 14905 + ... + 25751.

It is an arithmetic number, because the mean of its divisors is an integer number (7213920).

Almost surely, 2^220497816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220497816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346268160).

220497816 is an abundant number, since it is smaller than the sum of its proper divisors (472038504).

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

220497816 is a wasteful number, since it uses less digits than its factorization.

220497816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10885 (or 10870 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 220497816 is about 14849.1688656302. The cubic root of 220497816 is about 604.1360671769.

The spelling of 220497816 in words is "two hundred twenty million, four hundred ninety-seven thousand, eight hundred sixteen".