25215423 has 8 divisors (see below), whose sum is σ = 33656448. Its totient is φ = 16792344.

The previous prime is 25215401. The next prime is 25215473. The reversal of 25215423 is 32451252.

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

It is not a de Polignac number, because 25215423 - 2²⁰ = 24166847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25215393 and 25215402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25215473) 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, 765 + ... + 7142.

It is an arithmetic number, because the mean of its divisors is an integer number (4207056).

Almost surely, 2^25215423 is an apocalyptic number.

25215423 is a deficient number, since it is larger than the sum of its proper divisors (8441025).

25215423 is a wasteful number, since it uses less digits than its factorization.

25215423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8973.

The product of its digits is 2400, while the sum is 24.

The square root of 25215423 is about 5021.4960918037. The cubic root of 25215423 is about 293.2392405108.

Adding to 25215423 its reverse (32451252), we get a palindrome (57666675).

The spelling of 25215423 in words is "twenty-five million, two hundred fifteen thousand, four hundred twenty-three".