22125778 has 12 divisors (see below), whose sum is σ = 34114122. Its totient is φ = 10762560.

The previous prime is 22125743. The next prime is 22125799. The reversal of 22125778 is 87752122.

It can be written as a sum of positive squares in 3 ways, for example, as 22118209 + 7569 = 4703^2 + 87^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1303 + ... + 6778.

Almost surely, 2^22125778 is an apocalyptic number.

22125778 is a deficient number, since it is larger than the sum of its proper divisors (11988344).

22125778 is an equidigital number, since it uses as much as digits as its factorization.

22125778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8157 (or 8120 counting only the distinct ones).

The product of its digits is 15680, while the sum is 34.

The square root of 22125778 is about 4703.8046302966. The cubic root of 22125778 is about 280.7369109190.

The spelling of 22125778 in words is "twenty-two million, one hundred twenty-five thousand, seven hundred seventy-eight".