22750081 has 2 divisors, whose sum is σ = 22750082. Its totient is φ = 22750080.

The previous prime is 22750069. The next prime is 22750099. The reversal of 22750081 is 18005722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19722481 + 3027600 = 4441^2 + 1740^2 .

It is a cyclic number.

It is not a de Polignac number, because 22750081 - 2⁷ = 22749953 is a prime.

It is a super-2 number, since 2×22750081² = 1035132371013122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22750031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11375040 + 11375041.

It is an arithmetic number, because the mean of its divisors is an integer number (11375041).

Almost surely, 2^22750081 is an apocalyptic number.

It is an amenable number.

22750081 is a deficient number, since it is larger than the sum of its proper divisors (1).

22750081 is an equidigital number, since it uses as much as digits as its factorization.

22750081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 22750081 is about 4769.7044981843. The cubic root of 22750081 is about 283.3528916910.

The spelling of 22750081 in words is "twenty-two million, seven hundred fifty thousand, eighty-one".