25217055 has 16 divisors (see below), whose sum is σ = 44830560. Its totient is φ = 13449024.

The previous prime is 25217053. The next prime is 25217077. The reversal of 25217055 is 55071252.

It is a happy number.

It is not a de Polignac number, because 25217055 - 2¹ = 25217053 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25217053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93262 + ... + 93531.

It is an arithmetic number, because the mean of its divisors is an integer number (2801910).

Almost surely, 2^25217055 is an apocalyptic number.

25217055 is a deficient number, since it is larger than the sum of its proper divisors (19613505).

25217055 is a wasteful number, since it uses less digits than its factorization.

25217055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186807 (or 186801 counting only the distinct ones).

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

The square root of 25217055 is about 5021.6585905456. The cubic root of 25217055 is about 293.2455667464.

The spelling of 25217055 in words is "twenty-five million, two hundred seventeen thousand, fifty-five".