220651470 has 144 divisors (see below), whose sum is σ = 632052720. Its totient is φ = 53374464.

The previous prime is 220651439. The next prime is 220651499. The reversal of 220651470 is 74156022.

220651470 is a `hidden beast` number, since 2 + 2 + 0 + 651 + 4 + 7 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1353609 + ... + 1353771.

It is an arithmetic number, because the mean of its divisors is an integer number (4389255).

Almost surely, 2^220651470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220651470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316026360).

220651470 is an abundant number, since it is smaller than the sum of its proper divisors (411401250).

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

220651470 is a wasteful number, since it uses less digits than its factorization.

220651470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 220651470 is about 14854.3417895240. The cubic root of 220651470 is about 604.2763654210.

The spelling of 220651470 in words is "two hundred twenty million, six hundred fifty-one thousand, four hundred seventy".