40147231 has 8 divisors (see below), whose sum is σ = 40597760. Its totient is φ = 39699288.

The previous prime is 40147187. The next prime is 40147243. The reversal of 40147231 is 13274104.

40147231 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 40147231 - 2⁹ = 40146719 is a prime.

It is a super-2 number, since 2×40147231² = 3223600313934722, 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 (40147291) 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, 50620 + ... + 51406.

It is an arithmetic number, because the mean of its divisors is an integer number (5074720).

Almost surely, 2^40147231 is an apocalyptic number.

40147231 is a deficient number, since it is larger than the sum of its proper divisors (450529).

40147231 is a wasteful number, since it uses less digits than its factorization.

40147231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 40147231 is about 6336.1842618409. The cubic root of 40147231 is about 342.4142780124.

The spelling of 40147231 in words is "forty million, one hundred forty-seven thousand, two hundred thirty-one".