40424155 has 16 divisors (see below), whose sum is σ = 51303168. Its totient is φ = 30528000.

The previous prime is 40424149. The next prime is 40424177. The reversal of 40424155 is 55142404.

It is a happy number.

It is not a de Polignac number, because 40424155 - 2⁵ = 40424123 is a prime.

It is a super-2 number, since 2×40424155² = 3268224614928050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3175 + ... + 9535.

It is an arithmetic number, because the mean of its divisors is an integer number (3206448).

Almost surely, 2^40424155 is an apocalyptic number.

40424155 is a deficient number, since it is larger than the sum of its proper divisors (10879013).

40424155 is a wasteful number, since it uses less digits than its factorization.

40424155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6438.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 40424155 is about 6357.9992922302. Note that the first 3 decimals coincide. The cubic root of 40424155 is about 343.1997663336.

Adding to 40424155 its reverse (55142404), we get a palindrome (95566559).

The spelling of 40424155 in words is "forty million, four hundred twenty-four thousand, one hundred fifty-five".