25630381 has 24 divisors (see below), whose sum is σ = 31225056. Its totient is φ = 20956320.

The previous prime is 25630379. The next prime is 25630391. The reversal of 25630381 is 18303652.

It is not a de Polignac number, because 25630381 - 2¹ = 25630379 is a prime.

It is a super-2 number, since 2×25630381² = 1313832860410322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25630351) 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 23 ways as a sum of consecutive naturals, for example, 121366 + ... + 121576.

It is an arithmetic number, because the mean of its divisors is an integer number (1301044).

Almost surely, 2^25630381 is an apocalyptic number.

It is an amenable number.

25630381 is a deficient number, since it is larger than the sum of its proper divisors (5594675).

25630381 is a wasteful number, since it uses less digits than its factorization.

25630381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 25630381 is about 5062.6456522257. The cubic root of 25630381 is about 294.8390618853.

The spelling of 25630381 in words is "twenty-five million, six hundred thirty thousand, three hundred eighty-one".