25563131 has 8 divisors (see below), whose sum is σ = 28567728. Its totient is φ = 22672000.

The previous prime is 25563079. The next prime is 25563137. The reversal of 25563131 is 13136552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25563131 - 2¹⁰ = 25562107 is a prime.

It is a super-2 number, since 2×25563131² = 1306947333046322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25563131.

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 7 ways as a sum of consecutive naturals, for example, 27890 + ... + 28791.

It is an arithmetic number, because the mean of its divisors is an integer number (3570966).

Almost surely, 2^25563131 is an apocalyptic number.

25563131 is a deficient number, since it is larger than the sum of its proper divisors (3004597).

25563131 is a wasteful number, since it uses less digits than its factorization.

25563131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56733.

The product of its digits is 2700, while the sum is 26.

The square root of 25563131 is about 5055.9995055380. Note that the first 3 decimals coincide. The cubic root of 25563131 is about 294.5809659171.

Adding to 25563131 its reverse (13136552), we get a palindrome (38699683).

The spelling of 25563131 in words is "twenty-five million, five hundred sixty-three thousand, one hundred thirty-one".