2185512001 has 2 divisors, whose sum is σ = 2185512002. Its totient is φ = 2185512000.

The previous prime is 2185511981. The next prime is 2185512013. The reversal of 2185512001 is 1002155812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2134532401 + 50979600 = 46201^2 + 7140^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185512001 - 2¹³ = 2185503809 is a prime.

It is not a weakly prime, because it can be changed into another prime (2185512071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092756000 + 1092756001.

It is an arithmetic number, because the mean of its divisors is an integer number (1092756001).

Almost surely, 2^2185512001 is an apocalyptic number.

It is an amenable number.

2185512001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185512001 is an equidigital number, since it uses as much as digits as its factorization.

2185512001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 2185512001 is about 46749.4599006235. The cubic root of 2185512001 is about 1297.7301615869.

Adding to 2185512001 its reverse (1002155812), we get a palindrome (3187667813).

It can be divided in two parts, 21855 and 12001, that added together give a square (33856 = 184²).

The spelling of 2185512001 in words is "two billion, one hundred eighty-five million, five hundred twelve thousand, one".