25221732 has 12 divisors (see below), whose sum is σ = 58850736. Its totient is φ = 8407240.

The previous prime is 25221673. The next prime is 25221739. The reversal of 25221732 is 23712252.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×25221732³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (25221739) 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, 1050894 + ... + 1050917.

It is an arithmetic number, because the mean of its divisors is an integer number (4904228).

Almost surely, 2^25221732 is an apocalyptic number.

It is an amenable number.

25221732 is an abundant number, since it is smaller than the sum of its proper divisors (33629004).

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

25221732 is a wasteful number, since it uses less digits than its factorization.

25221732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101818 (or 2101816 counting only the distinct ones).

The product of its digits is 1680, while the sum is 24.

The square root of 25221732 is about 5022.1242517485. The cubic root of 25221732 is about 293.2636950162.

Adding to 25221732 its reverse (23712252), we get a palindrome (48933984).

The spelling of 25221732 in words is "twenty-five million, two hundred twenty-one thousand, seven hundred thirty-two".