220607257 has 8 divisors (see below), whose sum is σ = 237794760. Its totient is φ = 203450880.

The previous prime is 220607251. The next prime is 220607269. The reversal of 220607257 is 752706022.

It can be written as a sum of positive squares in 4 ways, for example, as 50069776 + 170537481 = 7076^2 + 13059^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220607257 - 2²³ = 212218649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220607251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8169 + ... + 22537.

It is an arithmetic number, because the mean of its divisors is an integer number (29724345).

Almost surely, 2^220607257 is an apocalyptic number.

It is an amenable number.

220607257 is a deficient number, since it is larger than the sum of its proper divisors (17187503).

220607257 is a wasteful number, since it uses less digits than its factorization.

220607257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15563.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 220607257 is about 14852.8534968874. The cubic root of 220607257 is about 604.2360021343.

The spelling of 220607257 in words is "two hundred twenty million, six hundred seven thousand, two hundred fifty-seven".