22078225 has 12 divisors (see below), whose sum is σ = 29483356. Its totient is φ = 16303680.

The previous prime is 22078207. The next prime is 22078253. The reversal of 22078225 is 52287022.

22078225 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in 6 ways, for example, as 166464 + 21911761 = 408^2 + 4681^2 .

It is not a de Polignac number, because 22078225 - 2⁷ = 22078097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22078193 and 22078202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33642 + ... + 34291.

Almost surely, 2^22078225 is an apocalyptic number.

22078225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22078225 is a deficient number, since it is larger than the sum of its proper divisors (7405131).

22078225 is a wasteful number, since it uses less digits than its factorization.

22078225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67956 (or 67951 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 22078225 is about 4698.7471734495. The cubic root of 22078225 is about 280.5356455643.

The spelling of 22078225 in words is "twenty-two million, seventy-eight thousand, two hundred twenty-five".