572781217 has 4 divisors (see below), whose sum is σ = 578686276. Its totient is φ = 566876160.

The previous prime is 572781179. The next prime is 572781241. The reversal of 572781217 is 712187275.

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 449482401 + 123298816 = 21201^2 + 11104^2 .

It is a cyclic number.

It is not a de Polignac number, because 572781217 - 2⁷ = 572781089 is a prime.

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 572781217.

It is not an unprimeable number, because it can be changed into a prime (572781317) 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, 2952384 + ... + 2952577.

It is an arithmetic number, because the mean of its divisors is an integer number (144671569).

Almost surely, 2^572781217 is an apocalyptic number.

It is an amenable number.

572781217 is a deficient number, since it is larger than the sum of its proper divisors (5905059).

572781217 is an equidigital number, since it uses as much as digits as its factorization.

572781217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5905058.

The product of its digits is 54880, while the sum is 40.

The square root of 572781217 is about 23932.8480753963. The cubic root of 572781217 is about 830.4807864283.

The spelling of 572781217 in words is "five hundred seventy-two million, seven hundred eighty-one thousand, two hundred seventeen".