22025421 has 48 divisors (see below), whose sum is σ = 38413440. Its totient is φ = 11996160.

The previous prime is 22025383. The next prime is 22025429. The reversal of 22025421 is 12452022.

22025421 is a `hidden beast` number, since 220 + 25 + 421 = 666.

It is not a de Polignac number, because 22025421 - 2⁷ = 22025293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22025394 and 22025403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22025429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38425 + ... + 38993.

It is an arithmetic number, because the mean of its divisors is an integer number (800280).

Almost surely, 2^22025421 is an apocalyptic number.

It is an amenable number.

22025421 is a deficient number, since it is larger than the sum of its proper divisors (16388019).

22025421 is a wasteful number, since it uses less digits than its factorization.

22025421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22025421 is about 4693.1248651618. The cubic root of 22025421 is about 280.3118167379.

Adding to 22025421 its reverse (12452022), we get a palindrome (34477443).

The spelling of 22025421 in words is "twenty-two million, twenty-five thousand, four hundred twenty-one".