8557201001 has 4 divisors (see below), whose sum is σ = 8583053904. Its totient is φ = 8531348100.

The previous prime is 8557200973. The next prime is 8557201027. The reversal of 8557201001 is 1001027558.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8557201001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8557201031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12925955 + ... + 12926616.

It is an arithmetic number, because the mean of its divisors is an integer number (2145763476).

Almost surely, 2^8557201001 is an apocalyptic number.

It is an amenable number.

8557201001 is a deficient number, since it is larger than the sum of its proper divisors (25852903).

8557201001 is a wasteful number, since it uses less digits than its factorization.

8557201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25852902.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 8557201001 is about 92505.1404031149. The cubic root of 8557201001 is about 2045.3952564831.

Adding to 8557201001 its reverse (1001027558), we get a palindrome (9558228559).

The spelling of 8557201001 in words is "eight billion, five hundred fifty-seven million, two hundred one thousand, one".