22053781 has 2 divisors, whose sum is σ = 22053782. Its totient is φ = 22053780.

The previous prime is 22053767. The next prime is 22053791. The reversal of 22053781 is 18735022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13439556 + 8614225 = 3666^2 + 2935^2 .

It is a cyclic number.

It is not a de Polignac number, because 22053781 - 2¹³ = 22045589 is a prime.

It is a super-2 number, since 2×22053781² = 972738512791922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22053721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11026890 + 11026891.

It is an arithmetic number, because the mean of its divisors is an integer number (11026891).

Almost surely, 2^22053781 is an apocalyptic number.

It is an amenable number.

22053781 is a deficient number, since it is larger than the sum of its proper divisors (1).

22053781 is an equidigital number, since it uses as much as digits as its factorization.

22053781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 22053781 is about 4696.1453342076. The cubic root of 22053781 is about 280.4320752575.

The spelling of 22053781 in words is "twenty-two million, fifty-three thousand, seven hundred eighty-one".