40851493 has 4 divisors (see below), whose sum is σ = 43254540. Its totient is φ = 38448448.

The previous prime is 40851491. The next prime is 40851509. The reversal of 40851493 is 39415804.

40851493 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 38155329 + 2696164 = 6177^2 + 1642^2 .

It is a cyclic number.

It is not a de Polignac number, because 40851493 - 2¹ = 40851491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40851491) 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, 1201498 + ... + 1201531.

It is an arithmetic number, because the mean of its divisors is an integer number (10813635).

Almost surely, 2^40851493 is an apocalyptic number.

It is an amenable number.

40851493 is a deficient number, since it is larger than the sum of its proper divisors (2403047).

40851493 is a wasteful number, since it uses less digits than its factorization.

40851493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403046.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 40851493 is about 6391.5172690059. The cubic root of 40851493 is about 344.4048915811.

The spelling of 40851493 in words is "forty million, eight hundred fifty-one thousand, four hundred ninety-three".