220770757 has 4 divisors (see below), whose sum is σ = 220834476. Its totient is φ = 220707040.

The previous prime is 220770751. The next prime is 220770779. The reversal of 220770757 is 757077022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 207331201 + 13439556 = 14399^2 + 3666^2 .

It is a cyclic number.

It is not a de Polignac number, because 220770757 - 2¹⁵ = 220737989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220770751) 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 3 ways as a sum of consecutive naturals, for example, 26344 + ... + 33697.

It is an arithmetic number, because the mean of its divisors is an integer number (55208619).

Almost surely, 2^220770757 is an apocalyptic number.

It is an amenable number.

220770757 is a deficient number, since it is larger than the sum of its proper divisors (63719).

220770757 is an equidigital number, since it uses as much as digits as its factorization.

220770757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63718.

The product of its (nonzero) digits is 48020, while the sum is 37.

The square root of 220770757 is about 14858.3564703503. The cubic root of 220770757 is about 604.3852389749.

The spelling of 220770757 in words is "two hundred twenty million, seven hundred seventy thousand, seven hundred fifty-seven".