40181546 has 4 divisors (see below), whose sum is σ = 60272322. Its totient is φ = 20090772.

The previous prime is 40181543. The next prime is 40181551. The reversal of 40181546 is 64518104.

40181546 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 only one way, i.e., 27300625 + 12880921 = 5225^2 + 3589^2 .

It is a super-2 number, since 2×40181546² = 3229113277900232, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40181543) 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 as a sum of consecutive naturals, namely, 10045385 + ... + 10045388.

Almost surely, 2^40181546 is an apocalyptic number.

40181546 is a deficient number, since it is larger than the sum of its proper divisors (20090776).

40181546 is a wasteful number, since it uses less digits than its factorization.

40181546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20090775.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 40181546 is about 6338.8915434798. The cubic root of 40181546 is about 342.5118073611.

The spelling of 40181546 in words is "forty million, one hundred eighty-one thousand, five hundred forty-six".