40015231 has 8 divisors (see below), whose sum is σ = 40439520. Its totient is φ = 39593568.

The previous prime is 40015219. The next prime is 40015247. The reversal of 40015231 is 13251004.

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 40015231 - 2¹³ = 40007039 is a prime.

It is a super-2 number, since 2×40015231² = 3202437423966722, 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 (40015211) 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, 44670 + ... + 45556.

It is an arithmetic number, because the mean of its divisors is an integer number (5054940).

Almost surely, 2^40015231 is an apocalyptic number.

40015231 is a deficient number, since it is larger than the sum of its proper divisors (424289).

40015231 is a wasteful number, since it uses less digits than its factorization.

40015231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 40015231 is about 6325.7593220103. The cubic root of 40015231 is about 342.0385915664.

Adding to 40015231 its reverse (13251004), we get a palindrome (53266235).

The spelling of 40015231 in words is "forty million, fifteen thousand, two hundred thirty-one".