22265857 has 2 divisors, whose sum is σ = 22265858. Its totient is φ = 22265856.

The previous prime is 22265849. The next prime is 22265861. The reversal of 22265857 is 75856222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18671041 + 3594816 = 4321^2 + 1896^2 .

It is a cyclic number.

It is not a de Polignac number, because 22265857 - 2³ = 22265849 is a prime.

It is a super-3 number, since 3×22265857³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (22265807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11132928 + 11132929.

It is an arithmetic number, because the mean of its divisors is an integer number (11132929).

It is a Proth number, since it is equal to 1359 ⋅ 2¹⁴ + 1 and 1359 < 2¹⁴.

Almost surely, 2^22265857 is an apocalyptic number.

It is an amenable number.

22265857 is a deficient number, since it is larger than the sum of its proper divisors (1).

22265857 is an equidigital number, since it uses as much as digits as its factorization.

22265857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 37.

The square root of 22265857 is about 4718.6711053007. The cubic root of 22265857 is about 281.3281164413.

The spelling of 22265857 in words is "twenty-two million, two hundred sixty-five thousand, eight hundred fifty-seven".