25552147 has 2 divisors, whose sum is σ = 25552148. Its totient is φ = 25552146.

The previous prime is 25552123. The next prime is 25552157. The reversal of 25552147 is 74125552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25552147 - 2²³ = 17163539 is a prime.

It is not a weakly prime, because it can be changed into another prime (25552157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12776073 + 12776074.

It is an arithmetic number, because the mean of its divisors is an integer number (12776074).

Almost surely, 2^25552147 is an apocalyptic number.

25552147 is a deficient number, since it is larger than the sum of its proper divisors (1).

25552147 is an equidigital number, since it uses as much as digits as its factorization.

25552147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14000, while the sum is 31.

The square root of 25552147 is about 5054.9131545458. The cubic root of 25552147 is about 294.5387678927.

Adding to 25552147 its reverse (74125552), we get a palindrome (99677699).

The spelling of 25552147 in words is "twenty-five million, five hundred fifty-two thousand, one hundred forty-seven".