25561923 has 8 divisors (see below), whose sum is σ = 34115328. Its totient is φ = 17024904.

The previous prime is 25561891. The next prime is 25561969. The reversal of 25561923 is 32916552.

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

It is not a de Polignac number, because 25561923 - 2⁵ = 25561891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25561223) 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, 186 + ... + 7152.

It is an arithmetic number, because the mean of its divisors is an integer number (4264416).

Almost surely, 2^25561923 is an apocalyptic number.

25561923 is a deficient number, since it is larger than the sum of its proper divisors (8553405).

25561923 is a wasteful number, since it uses less digits than its factorization.

25561923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8193.

The product of its digits is 16200, while the sum is 33.

The square root of 25561923 is about 5055.8800420896. The cubic root of 25561923 is about 294.5763256481.

The spelling of 25561923 in words is "twenty-five million, five hundred sixty-one thousand, nine hundred twenty-three".