39042203281 has 27 divisors (see below), whose sum is σ = 42404002609. Its totient is φ = 35939431808.

The previous prime is 39042203267. The next prime is 39042203297. The reversal of 39042203281 is 18230224093.

It is a happy number.

The square root of 39042203281 is 197591.

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

It can be written as a sum of positive squares in 4 ways, for example, as 25395290881 + 13646912400 = 159359^2 + 116820^2 .

It is not a de Polignac number, because 39042203281 - 2⁷ = 39042203153 is a prime.

It is a super-2 number, since 2×39042203281² (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 (39042203581) 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 26 ways as a sum of consecutive naturals, for example, 198183675 + ... + 198183871.

Almost surely, 2^39042203281 is an apocalyptic number.

39042203281 is the 197591-st square number.

39042203281 is the 98796-th centered octagonal number.

It is an amenable number.

39042203281 is a deficient number, since it is larger than the sum of its proper divisors (3361799328).

39042203281 is an frugal number, since it uses more digits than its factorization.

39042203281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

Multiplying 39042203281 by its product of nonzero digits (20736), we get a square (809579127234816 = 28453104²).

The spelling of 39042203281 in words is "thirty-nine billion, forty-two million, two hundred three thousand, two hundred eighty-one".