25531424 has 24 divisors (see below), whose sum is σ = 51120720. Its totient is φ = 12548416.

The previous prime is 25531423. The next prime is 25531427. The reversal of 25531424 is 42413552.

It is a happy number.

It is a super-2 number, since 2×25531424² = 1303707222935552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25531393 and 25531402.

It is not an unprimeable number, because it can be changed into a prime (25531423) 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, 4874 + ... + 8649.

It is an arithmetic number, because the mean of its divisors is an integer number (2130030).

Almost surely, 2^25531424 is an apocalyptic number.

It is an amenable number.

25531424 is an abundant number, since it is smaller than the sum of its proper divisors (25589296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25531424 is a wasteful number, since it uses less digits than its factorization.

25531424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13592 (or 13584 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 25531424 is about 5052.8629508428. The cubic root of 25531424 is about 294.4591219085.

Adding to 25531424 its reverse (42413552), we get a palindrome (67944976).

The spelling of 25531424 in words is "twenty-five million, five hundred thirty-one thousand, four hundred twenty-four".