2865521201 has 8 divisors (see below), whose sum is σ = 2938795944. Its totient is φ = 2792407680.

The previous prime is 2865521167. The next prime is 2865521213. The reversal of 2865521201 is 1021255682.

It can be written as a sum of positive squares in 4 ways, for example, as 1038386176 + 1827135025 = 32224^2 + 42745^2 .

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 2865521201 - 2³⁰ = 1791779377 is a prime.

It is a super-2 number, since 2×2865521201² = 16422423506760964802, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2865521231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3890 + ... + 75803.

It is an arithmetic number, because the mean of its divisors is an integer number (367349493).

Almost surely, 2^2865521201 is an apocalyptic number.

It is an amenable number.

2865521201 is a deficient number, since it is larger than the sum of its proper divisors (73274743).

2865521201 is an equidigital number, since it uses as much as digits as its factorization.

2865521201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80611.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 2865521201 is about 53530.5632419462. The cubic root of 2865521201 is about 1420.3690770121.

Adding to 2865521201 its reverse (1021255682), we get a palindrome (3886776883).

The spelling of 2865521201 in words is "two billion, eight hundred sixty-five million, five hundred twenty-one thousand, two hundred one".