25723213 has 2 divisors, whose sum is σ = 25723214. Its totient is φ = 25723212.

The previous prime is 25723189. The next prime is 25723219. The reversal of 25723213 is 31232752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16499844 + 9223369 = 4062^2 + 3037^2 .

It is a cyclic number.

It is not a de Polignac number, because 25723213 - 2¹³ = 25715021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25723219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12861606 + 12861607.

It is an arithmetic number, because the mean of its divisors is an integer number (12861607).

Almost surely, 2^25723213 is an apocalyptic number.

It is an amenable number.

25723213 is a deficient number, since it is larger than the sum of its proper divisors (1).

25723213 is an equidigital number, since it uses as much as digits as its factorization.

25723213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 25.

The square root of 25723213 is about 5071.8056942276. The cubic root of 25723213 is about 295.1945972589.

Adding to 25723213 its reverse (31232752), we get a palindrome (56955965).

The spelling of 25723213 in words is "twenty-five million, seven hundred twenty-three thousand, two hundred thirteen".