40781533 has 8 divisors (see below), whose sum is σ = 43983576. Its totient is φ = 37588800.

The previous prime is 40781527. The next prime is 40781549. The reversal of 40781533 is 33518704.

It can be written as a sum of positive squares in 4 ways, for example, as 3790809 + 36990724 = 1947^2 + 6082^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40781533 - 2⁹ = 40781021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40781495 and 40781504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40781563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8763 + ... + 12583.

It is an arithmetic number, because the mean of its divisors is an integer number (5497947).

Almost surely, 2^40781533 is an apocalyptic number.

It is an amenable number.

40781533 is a deficient number, since it is larger than the sum of its proper divisors (3202043).

40781533 is a wasteful number, since it uses less digits than its factorization.

40781533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4655.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 40781533 is about 6386.0420449602. The cubic root of 40781533 is about 344.2081763419.

It can be divided in two parts, 40781 and 533, that added together give a palindrome (41314).

The spelling of 40781533 in words is "forty million, seven hundred eighty-one thousand, five hundred thirty-three".