25565953 has 4 divisors (see below), whose sum is σ = 29218240. Its totient is φ = 21913668.

The previous prime is 25565941. The next prime is 25565957. The reversal of 25565953 is 35956552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25565953 - 2⁵ = 25565921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25565957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1826133 + ... + 1826146.

It is an arithmetic number, because the mean of its divisors is an integer number (7304560).

Almost surely, 2^25565953 is an apocalyptic number.

It is an amenable number.

25565953 is a deficient number, since it is larger than the sum of its proper divisors (3652287).

25565953 is an equidigital number, since it uses as much as digits as its factorization.

25565953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3652286.

The product of its digits is 202500, while the sum is 40.

The square root of 25565953 is about 5056.2785722308. The cubic root of 25565953 is about 294.5918054461.

The spelling of 25565953 in words is "twenty-five million, five hundred sixty-five thousand, nine hundred fifty-three".