40065231 has 8 divisors (see below), whose sum is σ = 53552560. Its totient is φ = 26644032.

The previous prime is 40065217. The next prime is 40065251. The reversal of 40065231 is 13256004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40065231 - 2¹⁰ = 40064207 is a prime.

It is a super-2 number, since 2×40065231² = 3210445470166722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40065198 and 40065207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40065251) 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, 15100 + ... + 17553.

It is an arithmetic number, because the mean of its divisors is an integer number (6694070).

Almost surely, 2^40065231 is an apocalyptic number.

40065231 is a deficient number, since it is larger than the sum of its proper divisors (13487329).

40065231 is a wasteful number, since it uses less digits than its factorization.

40065231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33065.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 40065231 is about 6329.7101829389. The cubic root of 40065231 is about 342.1809941050.

The spelling of 40065231 in words is "forty million, sixty-five thousand, two hundred thirty-one".