25631120 has 20 divisors (see below), whose sum is σ = 59592540. Its totient is φ = 10252416.

The previous prime is 25631117. The next prime is 25631143. The reversal of 25631120 is 2113652.

It can be written as a sum of positive squares in 2 ways, for example, as 16679056 + 8952064 = 4084^2 + 2992^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 25631092 and 25631101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160115 + ... + 160274.

It is an arithmetic number, because the mean of its divisors is an integer number (2979627).

Almost surely, 2^25631120 is an apocalyptic number.

25631120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25631120 is an abundant number, since it is smaller than the sum of its proper divisors (33961420).

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

25631120 is a wasteful number, since it uses less digits than its factorization.

25631120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320402 (or 320396 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 25631120 is about 5062.7186372541. The cubic root of 25631120 is about 294.8418955534.

Adding to 25631120 its reverse (2113652), we get a palindrome (27744772).

The spelling of 25631120 in words is "twenty-five million, six hundred thirty-one thousand, one hundred twenty".