22290309505781 has 2 divisors, whose sum is σ = 22290309505782. Its totient is φ = 22290309505780.

The previous prime is 22290309505703. The next prime is 22290309505873. The reversal of 22290309505781 is 18750590309222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21973509383281 + 316800122500 = 4687591^2 + 562850^2 .

It is a cyclic number.

It is not a de Polignac number, because 22290309505781 - 2¹⁴ = 22290309489397 is a prime.

It is a super-2 number, since 2×22290309505781² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22290309502781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11145154752890 + 11145154752891.

It is an arithmetic number, because the mean of its divisors is an integer number (11145154752891).

Almost surely, 2^{22290309505781} is an apocalyptic number.

It is an amenable number.

22290309505781 is a deficient number, since it is larger than the sum of its proper divisors (1).

22290309505781 is an equidigital number, since it uses as much as digits as its factorization.

22290309505781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 22290309505781 in words is "twenty-two trillion, two hundred ninety billion, three hundred nine million, five hundred five thousand, seven hundred eighty-one".