25531416 has 96 divisors (see below), whose sum is σ = 75522000. Its totient is φ = 7990272.

The previous prime is 25531409. The next prime is 25531423. The reversal of 25531416 is 61413552.

It is an interprime number because it is at equal distance from previous prime (25531409) and next prime (25531423).

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

It is a self number, because there is not a number n which added to its sum of digits gives 25531416.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62220 + ... + 62628.

Almost surely, 2^25531416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25531416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37761000).

25531416 is an abundant number, since it is smaller than the sum of its proper divisors (49990584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25531416 is a wasteful number, since it uses less digits than its factorization.

25531416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 431 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 25531416 is about 5052.8621592123. The cubic root of 25531416 is about 294.4590911533.

Adding to 25531416 its reverse (61413552), we get a palindrome (86944968).

It can be divided in two parts, 2553 and 1416, that added together give a square (3969 = 63²).

The spelling of 25531416 in words is "twenty-five million, five hundred thirty-one thousand, four hundred sixteen".