40229281 has 4 divisors (see below), whose sum is σ = 40247572. Its totient is φ = 40210992.

The previous prime is 40229263. The next prime is 40229291. The reversal of 40229281 is 18292204.

40229281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9979281 + 30250000 = 3159^2 + 5500^2 .

It is a cyclic number.

It is not a de Polignac number, because 40229281 - 2¹¹ = 40227233 is a prime.

It is a super-2 number, since 2×40229281² = 3236790099553922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40229221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5310 + ... + 10423.

It is an arithmetic number, because the mean of its divisors is an integer number (10061893).

Almost surely, 2^40229281 is an apocalyptic number.

It is an amenable number.

40229281 is a deficient number, since it is larger than the sum of its proper divisors (18291).

40229281 is a wasteful number, since it uses less digits than its factorization.

40229281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18290.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 40229281 is about 6342.6556740848. The cubic root of 40229281 is about 342.6473864398.

The spelling of 40229281 in words is "forty million, two hundred twenty-nine thousand, two hundred eighty-one".