40547381 has 4 divisors (see below), whose sum is σ = 46339872. Its totient is φ = 34754892.

The previous prime is 40547369. The next prime is 40547393. The reversal of 40547381 is 18374504.

40547381 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (40547369) and next prime (40547393).

It is a cyclic number.

It is not a de Polignac number, because 40547381 - 2¹⁸ = 40285237 is a prime.

It is a super-2 number, since 2×40547381² = 3288180211918322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40547081) 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, 2896235 + ... + 2896248.

It is an arithmetic number, because the mean of its divisors is an integer number (11584968).

Almost surely, 2^40547381 is an apocalyptic number.

It is an amenable number.

40547381 is a deficient number, since it is larger than the sum of its proper divisors (5792491).

40547381 is an equidigital number, since it uses as much as digits as its factorization.

40547381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5792490.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 40547381 is about 6367.6825454792. The cubic root of 40547381 is about 343.5481408360.

The spelling of 40547381 in words is "forty million, five hundred forty-seven thousand, three hundred eighty-one".