25551443 has 2 divisors, whose sum is σ = 25551444. Its totient is φ = 25551442.

The previous prime is 25551431. The next prime is 25551451. The reversal of 25551443 is 34415552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25551443 - 2¹⁰ = 25550419 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25551343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775721 + 12775722.

It is an arithmetic number, because the mean of its divisors is an integer number (12775722).

Almost surely, 2^25551443 is an apocalyptic number.

25551443 is a deficient number, since it is larger than the sum of its proper divisors (1).

25551443 is an equidigital number, since it uses as much as digits as its factorization.

25551443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12000, while the sum is 29.

The square root of 25551443 is about 5054.8435188441. The cubic root of 25551443 is about 294.5360628729.

Adding to 25551443 its reverse (34415552), we get a palindrome (59966995).

The spelling of 25551443 in words is "twenty-five million, five hundred fifty-one thousand, four hundred forty-three".