40181151 has 4 divisors (see below), whose sum is σ = 53574872. Its totient is φ = 26787432.

The previous prime is 40181117. The next prime is 40181159. The reversal of 40181151 is 15118104.

It is a happy number.

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

It is not a de Polignac number, because 40181151 - 2¹¹ = 40179103 is a prime.

It is a super-2 number, since 2×40181151² = 3229049791369602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40181159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6696856 + ... + 6696861.

It is an arithmetic number, because the mean of its divisors is an integer number (13393718).

Almost surely, 2^40181151 is an apocalyptic number.

40181151 is a deficient number, since it is larger than the sum of its proper divisors (13393721).

40181151 is a wasteful number, since it uses less digits than its factorization.

40181151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13393720.

The product of its (nonzero) digits is 160, while the sum is 21.

The square root of 40181151 is about 6338.8603865364. The cubic root of 40181151 is about 342.5106850166.

Subtracting from 40181151 its sum of digits (21), we obtain a triangular number (40181130 = T₈₉₆₄).

Adding to 40181151 its reverse (15118104), we get a palindrome (55299255).

The spelling of 40181151 in words is "forty million, one hundred eighty-one thousand, one hundred fifty-one".