40231312 has 20 divisors (see below), whose sum is σ = 85034736. Its totient is φ = 18286880.

The previous prime is 40231307. The next prime is 40231313. The reversal of 40231312 is 21313204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (40231313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114118 + ... + 114469.

Almost surely, 2^40231312 is an apocalyptic number.

It is an amenable number.

40231312 is an abundant number, since it is smaller than the sum of its proper divisors (44803424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40231312 is a wasteful number, since it uses less digits than its factorization.

40231312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228606 (or 228600 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40231312 is about 6342.8157785009. The cubic root of 40231312 is about 342.6531525975.

Adding to 40231312 its reverse (21313204), we get a palindrome (61544516).

It can be divided in two parts, 4023 and 1312, that added together give a palindrome (5335).

The spelling of 40231312 in words is "forty million, two hundred thirty-one thousand, three hundred twelve".