25221433 has 4 divisors (see below), whose sum is σ = 25352308. Its totient is φ = 25090560.

The previous prime is 25221419. The next prime is 25221467. The reversal of 25221433 is 33412252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10575504 + 14645929 = 3252^2 + 3827^2 .

It is a cyclic number.

It is not a de Polignac number, because 25221433 - 2¹³ = 25213241 is a prime.

It is a super-2 number, since 2×25221433² = 1272241365146978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25221403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65148 + ... + 65533.

It is an arithmetic number, because the mean of its divisors is an integer number (6338077).

Almost surely, 2^25221433 is an apocalyptic number.

It is an amenable number.

25221433 is a deficient number, since it is larger than the sum of its proper divisors (130875).

25221433 is a wasteful number, since it uses less digits than its factorization.

25221433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130874.

The product of its digits is 1440, while the sum is 22.

The square root of 25221433 is about 5022.0944833804. The cubic root of 25221433 is about 293.2625361454.

Adding to 25221433 its reverse (33412252), we get a palindrome (58633685).

The spelling of 25221433 in words is "twenty-five million, two hundred twenty-one thousand, four hundred thirty-three".