22400425 has 12 divisors (see below), whose sum is σ = 27870736. Its totient is φ = 17859600.

The previous prime is 22400423. The next prime is 22400431. The reversal of 22400425 is 52400422.

It is not a de Polignac number, because 22400425 - 2¹ = 22400423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22400423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6922 + ... + 9628.

Almost surely, 2^22400425 is an apocalyptic number.

22400425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22400425 is a deficient number, since it is larger than the sum of its proper divisors (5470311).

22400425 is a wasteful number, since it uses less digits than its factorization.

22400425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3048 (or 3043 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 22400425 is about 4732.9087250865. The cubic root of 22400425 is about 281.8937320701.

Adding to 22400425 its reverse (52400422), we get a palindrome (74800847).

The spelling of 22400425 in words is "twenty-two million, four hundred thousand, four hundred twenty-five".