25221253 has 2 divisors, whose sum is σ = 25221254. Its totient is φ = 25221252.

The previous prime is 25221241. The next prime is 25221277. The reversal of 25221253 is 35212252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17833729 + 7387524 = 4223^2 + 2718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25221253 is a prime.

It is a super-2 number, since 2×25221253² = 1272223205780018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25221223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12610626 + 12610627.

It is an arithmetic number, because the mean of its divisors is an integer number (12610627).

Almost surely, 2^25221253 is an apocalyptic number.

It is an amenable number.

25221253 is a deficient number, since it is larger than the sum of its proper divisors (1).

25221253 is an equidigital number, since it uses as much as digits as its factorization.

25221253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 22.

The square root of 25221253 is about 5022.0765625386. The cubic root of 25221253 is about 293.2618384929.

Subtracting 25221253 from its reverse (35212252), we obtain a palindrome (9990999).

The spelling of 25221253 in words is "twenty-five million, two hundred twenty-one thousand, two hundred fifty-three".