25623615 has 16 divisors (see below), whose sum is σ = 41061888. Its totient is φ = 13644576.

The previous prime is 25623613. The next prime is 25623649. The reversal of 25623615 is 51632652.

It is not a de Polignac number, because 25623615 - 2¹ = 25623613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25623613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15142 + ... + 16748.

It is an arithmetic number, because the mean of its divisors is an integer number (2566368).

Almost surely, 2^25623615 is an apocalyptic number.

25623615 is a deficient number, since it is larger than the sum of its proper divisors (15438273).

25623615 is a wasteful number, since it uses less digits than its factorization.

25623615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678.

The product of its digits is 10800, while the sum is 30.

The square root of 25623615 is about 5061.9773804315. The cubic root of 25623615 is about 294.8131153773.

It can be divided in two parts, 256 and 23615, that added together give a triangular number (23871 = T₂₁₈).

The spelling of 25623615 in words is "twenty-five million, six hundred twenty-three thousand, six hundred fifteen".