2272231021781 has 12 divisors (see below), whose sum is σ = 2644715434572. Its totient is φ = 1946515491648.

The previous prime is 2272231021757. The next prime is 2272231021787. The reversal of 2272231021781 is 1871201322722.

It can be written as a sum of positive squares in 2 ways, for example, as 1121618674225 + 1150612347556 = 1059065^2 + 1072666^2 .

It is not a de Polignac number, because 2272231021781 - 2¹⁴ = 2272231005397 is a prime.

It is a super-2 number, since 2×2272231021781² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2272231021787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13140590 + ... + 13312383.

It is an arithmetic number, because the mean of its divisors is an integer number (220392952881).

Almost surely, 2^{2272231021781} is an apocalyptic number.

It is an amenable number.

2272231021781 is a deficient number, since it is larger than the sum of its proper divisors (372484412791).

2272231021781 is a wasteful number, since it uses less digits than its factorization.

2272231021781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26454740 (or 26454733 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The spelling of 2272231021781 in words is "two trillion, two hundred seventy-two billion, two hundred thirty-one million, twenty-one thousand, seven hundred eighty-one".