40155 has 8 divisors (see below), whose sum is σ = 64272.
Its totient is φ = 21408.
The previous prime is 40153. The next prime is 40163. The reversal of 40155 is 55104.
Adding to 40155 its reverse (55104), we get a palindrome (95259).
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 40155 - 21 = 40153 is a prime.
It is a super-2 number, since 2×401552 = 3224848050, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 2677 = 40155 / (4 + 0 + 1 + 5 + 5).
It is not an unprimeable number, because it can be changed into a prime (40151) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1324 + ... + 1353.
It is an arithmetic number, because the mean of its divisors is an integer number (8034).
240155 is an apocalyptic number.
40155 is a deficient number, since it is larger than the sum of its proper divisors (24117).
40155 is a wasteful number, since it uses less digits than its factorization.
40155 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2685.
The product of its (nonzero) digits is 100, while the sum is 15.
The square root of 40155 is about 200.3871253349.
The cubic root of 40155 is about 34.2436363761.
The spelling of 40155 in words is "forty thousand, one hundred fifty-five".