25229823 has 4 divisors (see below), whose sum is σ = 33639768. Its totient is φ = 16819880.

The previous prime is 25229807. The next prime is 25229833. The reversal of 25229823 is 32892252.

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 25229823 - 2⁴ = 25229807 is a prime.

It is a super-2 number, since 2×25229823² = 1273087937222658, which contains 22 as substring.

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 (25229833) 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, 4204968 + ... + 4204973.

It is an arithmetic number, because the mean of its divisors is an integer number (8409942).

Almost surely, 2^25229823 is an apocalyptic number.

25229823 is a deficient number, since it is larger than the sum of its proper divisors (8409945).

25229823 is an equidigital number, since it uses as much as digits as its factorization.

25229823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8409944.

The product of its digits is 17280, while the sum is 33.

The square root of 25229823 is about 5022.9297227813. The cubic root of 25229823 is about 293.2950508178.

Adding to 25229823 its sum of digits (33), we get a triangular number (25229856 = T₇₁₀₃).

The spelling of 25229823 in words is "twenty-five million, two hundred twenty-nine thousand, eight hundred twenty-three".