571253985 has 32 divisors (see below), whose sum is σ = 1024577280. Its totient is φ = 301964544.

The previous prime is 571253983. The next prime is 571253987. The reversal of 571253985 is 589352175.

It is an interprime number because it is at equal distance from previous prime (571253983) and next prime (571253987).

It is not a de Polignac number, because 571253985 - 2¹ = 571253983 is a prime.

It is a super-2 number, since 2×571253985² = 652662230756760450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 571253985.

It is not an unprimeable number, because it can be changed into a prime (571253983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3469 + ... + 33978.

It is an arithmetic number, because the mean of its divisors is an integer number (32018040).

Almost surely, 2^571253985 is an apocalyptic number.

It is an amenable number.

571253985 is a deficient number, since it is larger than the sum of its proper divisors (453323295).

571253985 is a wasteful number, since it uses less digits than its factorization.

571253985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37574 (or 37568 counting only the distinct ones).

The product of its digits is 378000, while the sum is 45.

The square root of 571253985 is about 23900.9201705708. The cubic root of 571253985 is about 829.7420134950.

The spelling of 571253985 in words is "five hundred seventy-one million, two hundred fifty-three thousand, nine hundred eighty-five".