25630515 has 24 divisors (see below), whose sum is σ = 45094608. Its totient is φ = 13464000.

The previous prime is 25630513. The next prime is 25630559. The reversal of 25630515 is 51503652.

25630515 is a `hidden beast` number, since 25 + 630 + 5 + 1 + 5 = 666.

It is not a de Polignac number, because 25630515 - 2¹ = 25630513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25630511) 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, 1236 + ... + 7265.

It is an arithmetic number, because the mean of its divisors is an integer number (1878942).

Almost surely, 2^25630515 is an apocalyptic number.

25630515 is a deficient number, since it is larger than the sum of its proper divisors (19464093).

25630515 is a wasteful number, since it uses less digits than its factorization.

25630515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8579 (or 8576 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 25630515 is about 5062.6588863956. The cubic root of 25630515 is about 294.8395757074.

The spelling of 25630515 in words is "twenty-five million, six hundred thirty thousand, five hundred fifteen".