185425213 has 2 divisors, whose sum is σ = 185425214. Its totient is φ = 185425212.

The previous prime is 185425189. The next prime is 185425249. The reversal of 185425213 is 312524581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182196004 + 3229209 = 13498^2 + 1797^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185425213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (185428213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92712606 + 92712607.

It is an arithmetic number, because the mean of its divisors is an integer number (92712607).

Almost surely, 2^185425213 is an apocalyptic number.

It is an amenable number.

185425213 is a deficient number, since it is larger than the sum of its proper divisors (1).

185425213 is an equidigital number, since it uses as much as digits as its factorization.

185425213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 31.

The square root of 185425213 is about 13617.0926779544. The cubic root of 185425213 is about 570.2381409772.

Adding to 185425213 its reverse (312524581), we get a palindrome (497949794).

The spelling of 185425213 in words is "one hundred eighty-five million, four hundred twenty-five thousand, two hundred thirteen".