40155218 has 8 divisors (see below), whose sum is σ = 60324348. Its totient is φ = 20047104.

The previous prime is 40155209. The next prime is 40155233. The reversal of 40155218 is 81255104.

It can be written as a sum of positive squares in 2 ways, for example, as 39526369 + 628849 = 6287^2 + 793^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40155218² = 3224883065255048, which contains 22 as substring.

It is an unprimeable number.

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, 13571 + ... + 16262.

Almost surely, 2^40155218 is an apocalyptic number.

40155218 is a deficient number, since it is larger than the sum of its proper divisors (20169130).

40155218 is a wasteful number, since it uses less digits than its factorization.

40155218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30508.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 40155218 is about 6336.8144994153. The cubic root of 40155218 is about 342.4369834513.

The spelling of 40155218 in words is "forty million, one hundred fifty-five thousand, two hundred eighteen".