25552017 has 20 divisors (see below), whose sum is σ = 40181680. Its totient is φ = 16137144.

The previous prime is 25552013. The next prime is 25552027. The reversal of 25552017 is 71025552.

It is a happy number.

It is not a de Polignac number, because 25552017 - 2² = 25552013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25552013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6763 + ... + 9840.

It is an arithmetic number, because the mean of its divisors is an integer number (2009084).

Almost surely, 2^25552017 is an apocalyptic number.

25552017 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25552017 is a deficient number, since it is larger than the sum of its proper divisors (14629663).

25552017 is a wasteful number, since it uses less digits than its factorization.

25552017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16634 (or 16625 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 25552017 is about 5054.9002957526. The cubic root of 25552017 is about 294.5382683900.

Adding to 25552017 its reverse (71025552), we get a palindrome (96577569).

The spelling of 25552017 in words is "twenty-five million, five hundred fifty-two thousand, seventeen".