25502863 has 4 divisors (see below), whose sum is σ = 26325568. Its totient is φ = 24680160.

The previous prime is 25502831. The next prime is 25502899. The reversal of 25502863 is 36820552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25502863 - 2⁵ = 25502831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 822673 = 25502863 / (2 + 5 + 5 + 0 + 2 + 8 + 6 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25502563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411306 + ... + 411367.

It is an arithmetic number, because the mean of its divisors is an integer number (6581392).

Almost surely, 2^25502863 is an apocalyptic number.

25502863 is a deficient number, since it is larger than the sum of its proper divisors (822705).

25502863 is an equidigital number, since it uses as much as digits as its factorization.

25502863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822704.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 25502863 is about 5050.0359404662. The cubic root of 25502863 is about 294.3492809934.

The spelling of 25502863 in words is "twenty-five million, five hundred two thousand, eight hundred sixty-three".