40136231 has 8 divisors (see below), whose sum is σ = 41899104. Its totient is φ = 38409120.

The previous prime is 40136197. The next prime is 40136233. The reversal of 40136231 is 13263104.

40136231 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 a de Polignac number, because none of the positive numbers 2^k-40136231 is a prime.

It is a super-2 number, since 2×40136231² = 3221834077770722, 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 (40136233) 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, 6635 + ... + 11148.

It is an arithmetic number, because the mean of its divisors is an integer number (5237388).

Almost surely, 2^40136231 is an apocalyptic number.

40136231 is a deficient number, since it is larger than the sum of its proper divisors (1762873).

40136231 is a wasteful number, since it uses less digits than its factorization.

40136231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17881.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 40136231 is about 6335.3161720628. The cubic root of 40136231 is about 342.3830022888.

Adding to 40136231 its reverse (13263104), we get a palindrome (53399335).

The spelling of 40136231 in words is "forty million, one hundred thirty-six thousand, two hundred thirty-one".