2243538381 has 16 divisors (see below), whose sum is σ = 3567366144. Its totient is φ = 1226281584.

The previous prime is 2243538379. The next prime is 2243538391. The reversal of 2243538381 is 1838353422.

It is not a de Polignac number, because 2243538381 - 2¹ = 2243538379 is a prime.

It is a super-2 number, since 2×2243538381² = 10066928934040202322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2243538371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2322021 + ... + 2322986.

It is an arithmetic number, because the mean of its divisors is an integer number (222960384).

Almost surely, 2^2243538381 is an apocalyptic number.

2243538381 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2243538381 is a deficient number, since it is larger than the sum of its proper divisors (1323827763).

2243538381 is a wasteful number, since it uses less digits than its factorization.

2243538381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4645040.

The product of its digits is 138240, while the sum is 39.

The square root of 2243538381 is about 47366.0044863402. The cubic root of 2243538381 is about 1309.1151068045.

The spelling of 2243538381 in words is "two billion, two hundred forty-three million, five hundred thirty-eight thousand, three hundred eighty-one".