220700457 has 10 divisors (see below), whose sum is σ = 329688458. Its totient is φ = 147133584.

The previous prime is 220700437. The next prime is 220700471. The reversal of 220700457 is 754007022.

220700457 is a `hidden beast` number, since 2 + 207 + 0 + 0 + 457 = 666.

It can be written as a sum of positive squares in only one way, i.e., 176464656 + 44235801 = 13284^2 + 6651^2 .

It is not a de Polignac number, because 220700457 - 2¹² = 220696361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220700457.

It is not an unprimeable number, because it can be changed into a prime (220700407) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1362268 + ... + 1362429.

Almost surely, 2^220700457 is an apocalyptic number.

220700457 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

220700457 is a deficient number, since it is larger than the sum of its proper divisors (108988001).

220700457 is an equidigital number, since it uses as much as digits as its factorization.

220700457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2724709 (or 2724700 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 220700457 is about 14855.9906098516. The cubic root of 220700457 is about 604.3210807299.

Adding to 220700457 its reverse (754007022), we get a palindrome (974707479).

The spelling of 220700457 in words is "two hundred twenty million, seven hundred thousand, four hundred fifty-seven".