25216623 has 8 divisors (see below), whose sum is σ = 37358000. Its totient is φ = 16811064.

The previous prime is 25216613. The next prime is 25216657. The reversal of 25216623 is 32661252.

25216623 is a `hidden beast` number, since 25 + 2 + 16 + 623 = 666.

It is not a de Polignac number, because 25216623 - 2¹² = 25212527 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 933949 = 25216623 / (2 + 5 + 2 + 1 + 6 + 6 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25216613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466948 + ... + 467001.

It is an arithmetic number, because the mean of its divisors is an integer number (4669750).

Almost surely, 2^25216623 is an apocalyptic number.

25216623 is a deficient number, since it is larger than the sum of its proper divisors (12141377).

25216623 is an equidigital number, since it uses as much as digits as its factorization.

25216623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933958 (or 933952 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 25216623 is about 5021.6155766845. The cubic root of 25216623 is about 293.2438921812.

Adding to 25216623 its reverse (32661252), we get a palindrome (57877875).

The spelling of 25216623 in words is "twenty-five million, two hundred sixteen thousand, six hundred twenty-three".