40312315 has 4 divisors (see below), whose sum is σ = 48374784. Its totient is φ = 32249848.

The previous prime is 40312313. The next prime is 40312343. The reversal of 40312315 is 51321304.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40312315 - 2¹ = 40312313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40312292 and 40312301.

It is not an unprimeable number, because it can be changed into a prime (40312313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4031227 + ... + 4031236.

It is an arithmetic number, because the mean of its divisors is an integer number (12093696).

Almost surely, 2^40312315 is an apocalyptic number.

40312315 is a deficient number, since it is larger than the sum of its proper divisors (8062469).

40312315 is an equidigital number, since it uses as much as digits as its factorization.

40312315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8062468.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 40312315 is about 6349.1979808477. The cubic root of 40312315 is about 342.8829680035.

Adding to 40312315 its reverse (51321304), we get a palindrome (91633619).

It can be divided in two parts, 40312 and 315, that multiplied together give a triangular number (12698280 = T₅₀₃₉).

The spelling of 40312315 in words is "forty million, three hundred twelve thousand, three hundred fifteen".