25563135 has 32 divisors (see below), whose sum is σ = 44291520. Its totient is φ = 12515328.

The previous prime is 25563079. The next prime is 25563137. The reversal of 25563135 is 53136552.

It is a Cunningham number, because it is equal to 5056²-1.

It is not a de Polignac number, because 25563135 - 2⁶ = 25563071 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25563137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65521 + ... + 65909.

It is an arithmetic number, because the mean of its divisors is an integer number (1384110).

Almost surely, 2^25563135 is an apocalyptic number.

25563135 is a deficient number, since it is larger than the sum of its proper divisors (18728385).

25563135 is a wasteful number, since it uses less digits than its factorization.

25563135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747.

The product of its digits is 13500, while the sum is 30.

The square root of 25563135 is about 5055.9999011076. Note that the first 4 decimals coincide. The cubic root of 25563135 is about 294.5809812820.

Adding to 25563135 its reverse (53136552), we get a palindrome (78699687).

The spelling of 25563135 in words is "twenty-five million, five hundred sixty-three thousand, one hundred thirty-five".