40263231 has 8 divisors (see below), whose sum is σ = 53939584. Its totient is φ = 26714520.

The previous prime is 40263229. The next prime is 40263239. The reversal of 40263231 is 13236204.

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 40263231 - 2¹ = 40263229 is a prime.

It is a super-2 number, since 2×40263231² = 3242255541118722, 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 = 40263198 and 40263207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40263239) 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, 31171 + ... + 32436.

It is an arithmetic number, because the mean of its divisors is an integer number (6742448).

Almost surely, 2^40263231 is an apocalyptic number.

40263231 is a deficient number, since it is larger than the sum of its proper divisors (13676353).

40263231 is a wasteful number, since it uses less digits than its factorization.

40263231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63821.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 40263231 is about 6345.3314334241. The cubic root of 40263231 is about 342.7437474952.

Adding to 40263231 its reverse (13236204), we get a palindrome (53499435).

The spelling of 40263231 in words is "forty million, two hundred sixty-three thousand, two hundred thirty-one".