22420525 has 12 divisors (see below), whose sum is σ = 28074592. Its totient is φ = 17760240.

The previous prime is 22420523. The next prime is 22420529. The reversal of 22420525 is 52502422.

It is a happy number.

It is not a de Polignac number, because 22420525 - 2¹ = 22420523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22420496 and 22420505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22420523) 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, 1779 + ... + 6928.

Almost surely, 2^22420525 is an apocalyptic number.

22420525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22420525 is a deficient number, since it is larger than the sum of its proper divisors (5654067).

22420525 is a wasteful number, since it uses less digits than its factorization.

22420525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8820 (or 8815 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 22420525 is about 4735.0316788803. The cubic root of 22420525 is about 281.9780216930.

Adding to 22420525 its reverse (52502422), we get a palindrome (74922947).

The spelling of 22420525 in words is "twenty-two million, four hundred twenty thousand, five hundred twenty-five".