2581198201 has 4 divisors (see below), whose sum is σ = 2582165092. Its totient is φ = 2580231312.

The previous prime is 2581198187. The next prime is 2581198211. The reversal of 2581198201 is 1028911852.

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 51108201 + 2530090000 = 7149^2 + 50300^2 .

It is a cyclic number.

It is not a de Polignac number, because 2581198201 - 2¹⁷ = 2581067129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2581198211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479430 + ... + 484783.

It is an arithmetic number, because the mean of its divisors is an integer number (645541273).

Almost surely, 2^2581198201 is an apocalyptic number.

It is an amenable number.

2581198201 is a deficient number, since it is larger than the sum of its proper divisors (966891).

2581198201 is an equidigital number, since it uses as much as digits as its factorization.

2581198201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966890.

The product of its (nonzero) digits is 11520, while the sum is 37.

The square root of 2581198201 is about 50805.4938072646. The cubic root of 2581198201 is about 1371.7462593552.

The spelling of 2581198201 in words is "two billion, five hundred eighty-one million, one hundred ninety-eight thousand, two hundred one".