22779825 has 12 divisors (see below), whose sum is σ = 37662768. Its totient is φ = 12149200.

The previous prime is 22779811. The next prime is 22779829. The reversal of 22779825 is 52897722.

It is a happy number.

It is not a de Polignac number, because 22779825 - 2¹² = 22775729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22779829) 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, 151791 + ... + 151940.

It is an arithmetic number, because the mean of its divisors is an integer number (3138564).

Almost surely, 2^22779825 is an apocalyptic number.

22779825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22779825 is a deficient number, since it is larger than the sum of its proper divisors (14882943).

22779825 is a wasteful number, since it uses less digits than its factorization.

22779825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303744 (or 303739 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 22779825 is about 4772.8214925765. The cubic root of 22779825 is about 283.4763253624.

The spelling of 22779825 in words is "twenty-two million, seven hundred seventy-nine thousand, eight hundred twenty-five".