40243351 has 4 divisors (see below), whose sum is σ = 40287600. Its totient is φ = 40199104.

The previous prime is 40243319. The next prime is 40243361. The reversal of 40243351 is 15334204.

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

It is a cyclic number.

It is not a de Polignac number, because 40243351 - 2⁵ = 40243319 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 (40243361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20731 + ... + 22588.

It is an arithmetic number, because the mean of its divisors is an integer number (10071900).

Almost surely, 2^40243351 is an apocalyptic number.

40243351 is a deficient number, since it is larger than the sum of its proper divisors (44249).

40243351 is an equidigital number, since it uses as much as digits as its factorization.

40243351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44248.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 40243351 is about 6343.7647339730. The cubic root of 40243351 is about 342.6873282158.

Adding to 40243351 its reverse (15334204), we get a palindrome (55577555).

The spelling of 40243351 in words is "forty million, two hundred forty-three thousand, three hundred fifty-one".