40556351 has 4 divisors (see below), whose sum is σ = 44243304. Its totient is φ = 36869400.

The previous prime is 40556333. The next prime is 40556359. The reversal of 40556351 is 15365504.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40556351 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 (40556359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1843460 + ... + 1843481.

It is an arithmetic number, because the mean of its divisors is an integer number (11060826).

Almost surely, 2^40556351 is an apocalyptic number.

40556351 is a deficient number, since it is larger than the sum of its proper divisors (3686953).

40556351 is a wasteful number, since it uses less digits than its factorization.

40556351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3686952.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 40556351 is about 6368.3868444057. The cubic root of 40556351 is about 343.5734725141.

The spelling of 40556351 in words is "forty million, five hundred fifty-six thousand, three hundred fifty-one".