25631630 has 16 divisors (see below), whose sum is σ = 46211904. Its totient is φ = 10236000.

The previous prime is 25631623. The next prime is 25631633. The reversal of 25631630 is 3613652.

It is a self number, because there is not a number n which added to its sum of digits gives 25631630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25631633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5804 + ... + 9216.

It is an arithmetic number, because the mean of its divisors is an integer number (2888244).

Almost surely, 2^25631630 is an apocalyptic number.

25631630 is a deficient number, since it is larger than the sum of its proper divisors (20580274).

25631630 is a wasteful number, since it uses less digits than its factorization.

25631630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 25631630 is about 5062.7690051986. The cubic root of 25631630 is about 294.8438510976.

The spelling of 25631630 in words is "twenty-five million, six hundred thirty-one thousand, six hundred thirty".