25551541 has 2 divisors, whose sum is σ = 25551542. Its totient is φ = 25551540.

The previous prime is 25551521. The next prime is 25551553. The reversal of 25551541 is 14515552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15760900 + 9790641 = 3970^2 + 3129^2 .

It is a cyclic number.

It is not a de Polignac number, because 25551541 - 2¹⁹ = 25027253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25551521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775770 + 12775771.

It is an arithmetic number, because the mean of its divisors is an integer number (12775771).

Almost surely, 2^25551541 is an apocalyptic number.

It is an amenable number.

25551541 is a deficient number, since it is larger than the sum of its proper divisors (1).

25551541 is an equidigital number, since it uses as much as digits as its factorization.

25551541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5000, while the sum is 28.

The square root of 25551541 is about 5054.8532125078. The cubic root of 25551541 is about 294.5364394269.

It can be divided in two parts, 2555 and 1541, that added together give a 12-th power (4096 = 2¹²).

The spelling of 25551541 in words is "twenty-five million, five hundred fifty-one thousand, five hundred forty-one".