38216731081 has 9 divisors (see below), whose sum is σ = 40337921991. Its totient is φ = 36201805344.

The previous prime is 38216731037. The next prime is 38216731121. The reversal of 38216731081 is 18013761283.

The square root of 38216731081 is 195491.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 34043571081 + 4173160000 = 184509^2 + 64600^2 .

It is not a de Polignac number, because 38216731081 - 2¹³ = 38216722889 is a prime.

It is a super-2 number, since 2×38216731081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38216731781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3709185 + ... + 3719473.

Almost surely, 2^38216731081 is an apocalyptic number.

38216731081 is the 195491-st square number.

38216731081 is the 97746-th centered octagonal number.

It is an amenable number.

38216731081 is a deficient number, since it is larger than the sum of its proper divisors (2121190910).

38216731081 is an frugal number, since it uses more digits than its factorization.

38216731081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20616 (or 10308 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 38216731081 in words is "thirty-eight billion, two hundred sixteen million, seven hundred thirty-one thousand, eighty-one".