40172555 has 8 divisors (see below), whose sum is σ = 50744400. Its totient is φ = 30446496.

The previous prime is 40172551. The next prime is 40172599. The reversal of 40172555 is 55527104.

40172555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40172555 - 2² = 40172551 is a prime.

It is a super-2 number, since 2×40172555² = 3227668350456050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40172551) 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 7 ways as a sum of consecutive naturals, for example, 211340 + ... + 211529.

It is an arithmetic number, because the mean of its divisors is an integer number (6343050).

Almost surely, 2^40172555 is an apocalyptic number.

40172555 is a deficient number, since it is larger than the sum of its proper divisors (10571845).

40172555 is a wasteful number, since it uses less digits than its factorization.

40172555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422893.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 40172555 is about 6338.1823104105. The cubic root of 40172555 is about 342.4862587060.

Adding to 40172555 its reverse (55527104), we get a palindrome (95699659).

The spelling of 40172555 in words is "forty million, one hundred seventy-two thousand, five hundred fifty-five".